7-Physical Science Review-TCAP

7th Grade
TCAP Review

Physical Science

By Jessica Freeman

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

Water is made up of hydrogen and oxygen, two elements that were chemically combined. This makes water a(n)

• atom

• compound

• element

• mixture

Multiple Select

[check all that apply] Pure substances include:

• Elements

• Homogeneous Mixtures

• Compounds

• Heterogeneous Mixtures

Multiple Choice

What is the model scientists refer to when looking at the structure of an atom?

• The electron cloud model

• The atom model

• The structure of our world model

• The theory model

​THe Boher model of an Atom

• Electrons are located in electron orbits, called valence shells.

• ​Electrons have a negative charge.

• ​Protons are located in the nucleus and have a positive charge.

• ​Neutrons are also located in the nucleus, they have a neutral charge

Multiple Choice

The center of an atom has

• both electrons and protons

• a negative charge

• electrons

• a nucleus

Multiple Choice

Electrons have this type of charge

• positive

• neutral

• negative

Multiple Choice

Particles in an atom that have a positive charge are

• nuetrons

• electrons

• protons

• ion

Multiple Choice

Where are elctrons in an atom located

• in the nucleus

• in the outer shells

• everywhere

Multiple Choice

Protons and neutrons are located

• in the nucleus

• in the outer shells

• everywhere

Elements on the periodic table have a neutral charge.

• ​Neutral atoms have equal numbers of protons and electrons.

• ​

• ​

• ​Ions of an atom, are atoms with one more electron than its number of protons. Ions have a negative charge.

• ​

• ​

• ​Cations of an atom, are atoms with one less electron than its number of protons. Cations have a positive charge

Multiple Choice

A neutral atom has

• Equall amounts of protons and electrons

• Equall amounts of protons and neutrons

• Equall amounts of electrons and neutrons

Multiple Choice

Ions are atoms with one more electron than protons and will have a

• positive charge

• negative charge

• neutral charge

Multiple Choice

Cations are atoms with one less electron than protons and will have a

• positive charge

• Negative charge

• neutral charge

​Changing the number of protons in an atom, changes the type of element

Notice Hydrogen has 1 proton

​and Helium has 2, andLithium has 3.

​

​The number of protons in an atom is its atomic mass

​

​The number of protons and neutrons an atom has is its Atomic mass or weight.

Multiple Choice

Adding a proton to the nucleus of an atom changes

• the charge of the atom

• The stability of the atom

• The type of element

Multiple Choice

The atomic number of an atom is its

• number of protons

• number of electrons

• numbers of neutrons

• number of both its protons and its neutrons

Multiple Choice

The atomic mass of an atom is its

• number of protons

• number of electrons

• numbers of neutrons

• number of both its protons and its neutrons

Multiple Choice

Challenge question True or false:

Unstable atoms have more neutrons than protons in its nucleus

• True

• False

• sometimes

Multiple Choice

An atom of oxygen has a -2 charge. How many electrons does it have?

• 2

• 8

• 6

• 10

Multiple Choice

An atom has a negative charge. Which of the following MUST be true?

• it has the same number of protons and neutrons

• it has more protons than electrons

• it has more electrons than protons

• it has more neutrons than protons

Multiple Select

Select all of the following that affects mass number.

• protons

• neutrons

• electrons

• how common they are in the world

Multiple Choice

If two atoms are different elements, they must have...

• different mass numbers

• different numbers of protons

• different charges

• different colors

Multiple Choice

The atomic number is...

• the number of protons + neutrons

• the number of protons - electrons

• the number of protons

• the imbalance of protons and electrons

Multiple Choice

Particles in an atom that are positively charged

• neutron

• proton

• atom

• electron

The Periodic Table

Vocabulary and Practice Questions

Valance Electrons & Reactivity

I can explain that the valence electrons describe the reactivity of the element. 8.5(B)

state of matter and properties of matter

Multiple Choice

Matter is made up of tiny particles called_

• particles

• molecules

• atoms

• cells

Multiple Choice

A property that can be observed WITHOUT changing the chemical composition of an object

• chemical property

• physical property

Multiple Choice

Is this a chemical or physical change?

• Physical Change

• Chemical Change

Multiple Choice

Anthony is performing an experiment. He adds 0.25 grams of baking soda to 5 grams of water and stirs. Anthony watches as the baking soda dissolves in the water. If Anthony weighs the water and baking soda solution, what will its mass be?

• 4.75 grams

• 5.25 grams

• 5.0 grams

• 7.5 grams

Multiple Choice

If a reaction starts with a total 54g of reactants it should produce 

• a total of 40g of products
• a total of 54g of products

• a total of 180 g of products
• None of the above

Multiple Choice

All solids have a closely packed, fixed arrangement of particles.

• True

• False

Multiple Choice

Gas Laws involve what three terms?

• Solid Liquid Gas 
• Speed Velocity Acceleration 
• Elements Compounds Mixtures 
• Pressure Temperature Volume 

Multiple Choice

Charles's Law says that when the temperature of a gas rises (increases), its

• volume also increases

• mass increases

• volume decreases

• volume stays the same

Multiple Choice

The way molecules in a substance move around relative to each other

• a. kinetic energy

• b. freedom of movement

• c. potential energy

• d. freedom of speech

Multiple Choice

when matter changes from a solid to a gas and skips the liquid phase

• sublimation

• depostion

• endothermic

• exothermic

Multiple Choice

What happens in a chemical reaction?

• Bonds between atoms break and/or are formed

• New atoms are created and/or removed

• Protons move from one atom to another

• Electrons change into protons

Types of Chemical Reactions

physical science

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

How are chemical bonds formed?

• Atoms duplicate themselves

• Electrons move from one atom to another

• The number of protons and electrons in an element is changed

• Through changes in an atom's nucleus

Multiple Choice

What reaction has the following general formula:

A + B --> AB

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

when frozen carbon dioxide goes from a solid to a gas

• freezing

• melting

• vaporization

• frost

Multiple Choice

What type of reaction is the following:
$$2H_2+O_2->2H_2O$$  

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

Which of the following would indicate that a chemical reaction has occurred?

• A new element has been created

• A different substance has formed

• The total mass has either increased OR decreased

• The total number of elements has either increased OR decreased

Multiple Choice

How is particle motion related to temperature.

• a. if the particles in two pure substances have the same average speed, the substances must have the same average speed

• b. all the particles inside a substance are moving at the same speed, and that speed determines the same temperature

• c. how hot or cold a substance is depends on how fast the particles are moving

• d. the total kinetic energy of the particles in a substance determines the temperature of the substance

Multiple Choice

What is the general reaction scheme for a decomposition reaction?

• A + B --> AB

• AB --> A + B

• A + CD --> C + AD

• AB + CD --> CB + AD

• $$C_xH_y+O_2\ ->\ CO_2+H_2O$$

Multiple Choice

These are all models of the same molecule. What would this molecule look like in a chemical/molecular formula?

• CH

• C4H

• CH₄

• 4CH

Multiple Choice

2 NO₂ --> 2 O₂ + N₂

• Synthesis

• Decomposition

• Single displacement

• Double displacement

Multiple Choice

these particles are shaped, rigged, compacted, vibrate back and forth

• liquid

• gas

• solid

Multiple Choice

Which would indicate a chemical equation is balanced?

• If the number of atoms in the reactants is the same as the number of atoms in the products

• If the atoms have ionic OR covalent bonds

• If the atoms have full valence shells

• If the total energy has remained the same

Multiple Choice

What reaction has the following general formula:
$$C_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O$$  

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

When particles of a gas are heated

• they speed up and collide with the walls of their container

• slow down and won't collide with the walls of their container

• there will be no change

Multiple Choice

What type of reaction is the following:
$$2C_4H_{10}\ +13O_2\ ->\ 8CO_2+10H_2O$$

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

BEFORE the equation is balanced, how many Hydrogen atoms are present on the reactant side?

• 6

• 2

• 12

• 8

Multiple Choice

these particles have an indifferent shape, and definite volume

• solid

• liguid

• gas

Multiple Choice

What reaction has the following general formula:

A + CD --> C + AD

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

Why does the number of Carbon atoms need to be the same on both sides of the reaction?

• In a chemical reaction, no new atoms can be made

• Because the number of Oxygen atoms must be balanced with the number of Carbon and Hydrogen atoms

• Because the coefficients and the subscripts need to be equal

• It does NOT need to be the same

Multiple Choice

What type of reaction is the following:
$$3CuS\ +2Al\ ->\ Al_2S_3+3Cu$$

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Select

Temperature is a measure of kinetic energy. Every substance is made up of particles. The temperature of a substance is related to the kinetic energies of these particles. If a substance is hot, its particles tend to have a large amount of kinetic energy.

The particles in a substance have kinetic energy because they are moving. The particles are constantly in motion, even if the substance does not appear to be moving.

Select all of the statements that are true about the rubber ball shown above.

• a. if the ball is cold, its particles tend to have a small amount of kinetic energy

• b. the particles that make up the ball are moving even if the ball is not moving

• c. the temperature of the ball depends on the kinetic energies of the particles that make up the ball

Multiple Choice

What coefficient should go in the last blank space in order for the equation to be balanced?

• 1

• 2

• 3

• 4

Multiple Choice

What reaction has the following general formula:

AB + CD --> CB + AD

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

these particles have indefinite shape, indefinite volume. and expans

• solid

• liquid

• gas

Multiple Choice

2 NaBr + 1 Ca(OH)₂ ----> 1 CaBr₂ + 2 NaOH

• Synthesis (or combination)
• Decomposition
• Single displacement
• Double displacement

Multiple Choice

How many sulfur atoms are present in this molecule?

• 4

• 3

• 12

• 1

Multiple Choice

Charles' Law States...

• As Pressure goes up volume goes down
• As Pressure goes up temperature goes up
• As Volume goes up temperature goes up 
• As Pressure goes down volume goes down 

Multiple Select

In the molecule below, which of the following choices is a subscript? (Select all that apply)

• 3

• 2

• 4

• SO

Multiple Choice

going from a liquid to a solid is called

• melting

• condensation

• freezing

• vaporization

Multiple Choice

What does the Law of Conservation of Mass state?

• No new substances can be made or destroyed

• No new compounds can be made or destroyed

• No new atoms can be made or destroyed

• Mass cannot be lost from a physical reaction

Multiple Choice

Lily is doing a science experiment with a substance in a sealed jar. At first, the substance’s molecules are moving around each other. What will happen to Lily’s substance if she transfers energy into the substance and causes a phase change?

After the phase change, the substance’s molecules will move . . .

• a. faster, and the substance will be a liquid

• b. faster, and the substance will be a gas

• c. slower, and the substance will be a solid

• d. slower, and the substance will be a liquid.

Multiple Choice

Which of the following follows the Law of Conservation of Mass?

• CH₄ + 2 O₂ → 2CO₂ + 2 H₂O

• 2 CH₄ + 2 O₂ → CO₂ + 4 H₂O

• CH₄ + 2 O₂ → CO₂ + 2 H₂O

• All the above

Multiple Choice

going from a gas to a solid and skips the liquid phase is called

• deposition

• sublimination

• endothermic

Multiple Choice

In a chemical reaction, ________________________ are changed into _______________________.

• Reactants; Products

• Electrons; Molecules/Compounds

• Coefficients; Subscripts

• Original Elements; New Elements

Multiple Choice

when the speed of particles of gas in a container increases,

• the pressure decreases

• the pressure increases

• there will be no change in the pressure inside the container

Multiple Choice

Bacteria in milk causes it to curdle over time. What type of change is this?

• Chemical

• Physical

• Both

• Neither

Multiple Choice

when heat is exiting the system

• endothermic

• exothermic

• sublimination

• condensation

Multiple Choice

Which type of reaction pulls in thermal energy from the environment around it?

• Endothermic

• Exothermic

Multiple Choice

Temperature is a measure of the average kinetic energy (represented here by speed) of molecules in a substance

• a. True

• b. False

Multiple Choice

When building a HEATING pack, what type of reaction is it?

• Exothermic

• Endothermic

Multiple Choice

when heat is entering the system

• endothermic

• exothermic

• sublimination

• deposition

Multiple Choice

Moo like a cow for 2 seconds.

• Did it!

• No Way!

Multiple Select

The particles in liquids and gases are free to move while the particles in a solid have a fixed arrangement. This is why _____ take the shape of their containers while solids do not.

• liquids

• gases

• solids

• colors

Multiple Choice

these particles have atoms that lose their electrons. the mixture of electrons and nuclei that results is this

• solid

• liquid

• gas

• plasma

Multiple Choice

When a substance does not appear to be moving, the molecules of a substance are NOT moving also.

• a. True

• b. False

Multiple Choice

the particles in a solid are rigid and do not move

• true

• false

Multiple Choice

The pressure of a gas in increased, so the

• volume will increase

• volume will stay the same

• volume will decrease

Multiple Choice

a liquid does not have a shape of its own

• true

• false

Multiple Choice

Anthony measured the temperature of a pond near his house. Before he left for school, the water in the pond was 18°C. When he came home from school, the temperature of the pond was higher than it was in the morning.

What happened to the water molecules while he was at school?

• a. The molecules got closer together

• b. The molecules started moving faster.

• c. The water lost cold molecules.

• d. The molecules became larger

Multiple Choice

decreasing heat energy can cause a phase change

• true

• false

Multiple Choice

Whose law states that as pressure goes up, volume goes down?

• Charles 
• Boyle
• Aglow
• Mazias 

Multiple Choice

decreasing heat energy can cause a phase change

• true

• false

Multiple Choice

What happens to molecules when their kinetic energy decreases?

• a. They move slower

• b. They move faster

• c. They get heavier

• d. It depends on the type of molecules

Multiple Choice

increasing heat energy can cause a phase change

• true

• false

Multiple Choice

If heat is added to the air in a sealed container, the air pressure will

• stay the same

• go up (increase)

• go down (decrease)

Multiple Choice

the evaporation of water over time is an example of sublimation

• true

• false

Multiple Choice

Jamil’s bicycle is made of aluminum. When are the aluminum molecules in his bicycle moving?

The aluminum molecules are . . .

• a. only moving when Jamil is riding his bicycle.

• b. only moving when Jamil is not riding his bicycle

• c. always moving

• d. never moving

Multiple Choice

placing a balloon in a freezer will cause the balloon to expand

• true

• false

Multiple Choice

O + H₂ → H₂O

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g of water.

• 8

• 12

• 24

• 40

Multiple Choice

this is anything that has a mass and takes up space by having volume. it is made up of particles which can be atoms, molecules, or electrically charged particles called ions

• mass

• volume

• matter

• velocity

Multiple Choice

Scientists put a sample of water into a sealed tank. Water can be a solid, liquid, or gas. At first, the water was a liquid. Then, the scientists transferred energy out of the substance, and the water changed phase. What happened to the movement of the water molecules?

After the phase change, the water molecules moved . . .

• a. faster and started moving away from each other.

• b. faster and started moving around each other.

• c. slower and started moving in place.

• d. slower and started moving around each other.

Multiple Choice

When using a bicycle pump, the air pressure within the pump is ___________ as the handle is pushed down. This is compression.

• remains the same

• increases (goes up)

• decreases (goes down)

Multiple Choice

Which law?

• Charles 
• Boyle
• Hooke
• Peter Pan 

Multiple Choice

Describes the relationship between a gas's temperature and volume when its pressure remains constant

• Charles's Law

• Boyles Law

• The Law of Thermodynamics

Multiple Choice

What are the states of matter?

• solid, liquid, and juice
• solid and liquid
• solid and gas
• solid, liquid, and gas

Multiple Choice

In the wintertime, the air pressure in the tires on a car can decrease. This is because the temperature outside has _____________

• decreased (went down)

• increased (went up)

• stayed the same

Multiple Choice

Which law?

• Boyle

• Charles

• Landis

• Boykin

Multiple Choice

What state of matter undergoes changes in volume most easily? (It can be most easily compressed)

• solid

• liquid

• gas

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

Multiple Choice

the amount of space that matter fills up

• solid

• liquid

• volume

• gas

Multiple Choice

Which law?

• Charles

• Boyle

• Diegel

• Mitchell

Multiple Choice

This happens when particles gain enough energy to move independently. This results in either evaporation or boiling

• vaporization

• condensation

• evaporation

• freezing

Multiple Choice

Matter that has its own shape and takes up space.

• solid
• liquid
• gas

Multiple Choice

A balloon will pop in the atmosphere because..

• Pressure goes down volume goes up
• Pressure goes up volume goes down
• temperature goes down volume goes up
• volume goes down temperature goes down

Multiple Choice

Mg + F → MgF

24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride.

• 62 
• 38
• 24
• 14

Multiple Choice

Charles's law shows the relationship between which two factors of a gas ?

• volume and temperature 
• volume and pressure 
• pressure and volume
• volume and mass

Multiple Choice

Matter that always fills the shape in a container, such as air.

• solid
• liquid
• gas

Multiple Choice

Directly proportional means that as one value increases ....................

• the other stays the same 
• the other increases as well
• the other decereases
• the other goes to zero

Multiple Choice

What evidence supports that this is a PHYSICAL change?

• It creates a new substance

• It changes the state of matter to a liquid

• It is started on fire

Multiple Choice

Inversely proportional means as one value increases the other............. 

• increases 
• decreases 
• stays the same 
• goes to zero

Multiple Choice

Molecules are closest together in a 

• Solid
• Liquid
• Gas
• plasma

Multiple Choice

Temperature describes  the ______________ of particles.

• volume
• mass
• motion
• conductivity

Multiple Choice

How many elements does PbNO₇ have?

Hint: Every capital letter😉

• 2
• 3
• 4
• 5

Multiple Choice

When a basketball is left outside in the cold it goes flat because the volume of air inside the ball has been reduced. What  gas law does this represent?

• Boyle's Law
• Charles's Law

Multiple Choice

What state of matter are the particles moving the fastest and are farthest apart?

• Solid

• Liquid

• Gas

Multiple Choice

• this is a graph representing Boyle's law
• this is a graph representing Charles's law

Multiple Choice

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products

• a total of 80 g of products

• a total of 10g of products

• a total of 20g of products

Multiple Choice

• This is an example of Charles's law
• This is an example of Boyle's law

Multiple Choice

In this state of matter the particles "slip past" each other and take the shape of it's container.

• Solid

• Gas

• Liquid

Multiple Choice

If a balloon is cooled what will happen to the volume?

• Volume will increase
• Volume will decrease
• Volume will not change

Multiple Choice

How many nitrogen atoms does NH₃ have?

• 1
• 2
• 3
• 4

Multiple Choice

Which of the following would increase the (gas) pressure of a system?

• Increase the Temperature
• Pump in more gas
• Decrease the volume
• All of these

Multiple Choice

Are particles of matter always in motion?

• yes
• no

Multiple Choice

Which of the following represents the amount of space and object takes up?

• density

• volume

• mass

Multiple Choice

Which state of matter has particles that are somewhat close together and have enough kinetic energy to slide past each other?

• solid

• liquid

• gas

Multiple Choice

Substances present at the start of a chemical reaction are called ____.

• subscripts
• coefficients
• reactants
• products

Multiple Choice

______ is the amount of space an object takes up.

• mass
• volume

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

Which of the following is NOT a part of the Kinetic Theory of Matter?

• All matter is made up of tiny particles.

• Particles are always moving in random paths

• Occasionally, particles stop moving.

• The type of movement of particles depends on the amount of energy.

Multiple Choice

Substances that form as the result, or at the end, of a chemical reaction are called ____.

• products
• reactants
• coefficients
• subscripts

Multiple Choice

Which of the following states of matter has the LOWEST level of energy?

• Solid

• Liquid

• Gas

• Plasma

Multiple Choice

Is this a chemical or physical change?

• Physical Change

• Chemical Change

Multiple Choice

The energy of an object as it is in motion is defined as

• Potential Energy

• Elastic Energy

• Electric Energy

• Kinetic Energy

Multiple Choice

How many iron (Fe) atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6

Multiple Choice

What state of matter is shown in the image?

• Solid

• Liquid

• Gas

• Thermal Energy

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

All matter is made of _____ that are constantly moving.

• insulators

• particles

• convection

• pieces of plastic

Multiple Choice

How many nitrogen (N) atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6

Multiple Choice

How many oxygen (O) atoms are in 
Fe(NO₃)₂

• 1
• 2
• 3
• 6

Multiple Select

Which of the following is an open system?

• A

• B

• C

• D

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, rearranged

• None of the above

Multiple Choice

What evidence supports that this is a CHEMICAL change when the white stuff is set on fire?

• It creates a new substance of ash

• It changes the state of matter to a solid

• The product has the same properties as the reactant

Labelling

Label the reactants and products of the chemical reaction shown.

Drag labels to their correct position on the image

Products

Reactants

Multiple Select

Which of the following is close system?

• A

• B

• C

• D

Labelling

Label the reactants and products in the chemical equation shown.

Drag labels to their correct position on the image

Products

Reactants

Multiple Choice

What is the definition of conductivity?

• ability of a material to resist breaking

• how reflective (shiny) a surface is

• ability to complete an electric circuit

• ability to react to forces exerted by magnets

Multiple Choice

What are the reactants in this chemical equation?

• 6 CO₂ + 6 H₂O

• H₂O

• C₆H₁₂O₆

• C₆H₁₂O₆ + O₂

Multiple Choice

Which of the models of a chemical reaction best represents the Law of Conservation of Mass?

• A

• B

• C

• D

Multiple Choice

What are the products in this chemical equation?

• CO₂ + H₂O

• H₂O

• C₆H₁₂O₆

• C₆H₁₂O₆ + O₂

Multiple Choice

What are the reactants in this animation?

• The squiggly ash that comes off the top

• The white powder on the sand

• The smoke that is created

Multiple Choice

Select the chemical formula for this molecule?

• B₁F₃

• BF

• BF₃

• FB

Multiple Choice

Q. 

True or False

The mass of the reactants in a chemical equation must equal the mass of the products.

• TRUE

• FALSE

Multiple Choice

How many atoms of hydrogen are in

C₆H₁₂O₆

• 6

• 12

• 18

• 2

For example- There are 3 Valance Electrons in Aluminum, Al, shown in the image ->

​

Valance Electrons are on the outmost energy level

Dropdown

Examine the experiment shown, then fill in the blanks.



The experiment shows a ​

Select answer

system.

The mass at the end of the experiment will be ​

Select answer

the initial mass.

Multiple Choice

A student heated a 10 gram sample of a chemical in an open container. A chemical reaction occurred, and the mass of the sample was measured again. The mass of the sample was found to be less than before the reaction. Which of the following best explains the decrease in mass of the sample?

• The heat caused the chemical to become less dense.

• Some of the lighter particles were destroyed.

• The reaction gave off more heat than was added.

• Some of the particles escaped as a gas formed.

Multiple Choice

How many grams of Zn(NO₃)₂ was produced?

• 3 g

• 4 g

• 0 g

• 5 g

Multiple Choice

Is this a chemical or physical change?

Its filling up with a bubbling blue liquid!

• Physical Change

• Chemical Change

Multiple Choice

If AB is 18 grams and reacts in a closed system, which of the following could be the grams of A and B?

• A is 13 grams and B is 2 grams

• A is 18 grams and B is 5 grams

• A is 9 grams and B is 11 grams

• A is 12 grams and B is 6 grams

Multiple Choice

A chemical reaction that releases energy _________ and a chemical reaction that absorbs energy is called _____________.

• exothermic; endothermic

• endothermic; exothermic

• exothermic; accumulative

• liberal; endothermic

Multiple Choice

Which of the following is NOT a physical property?

• flammability

• melting point

• density

• luster

Multiple Choice

A system where only energy can be exchanged but not matter

• Close system

• Open system

Multiple Select

What evidence supports that this is a CHEMICAL change? There is more than 1 answer

• It creates a new substance of blue liquid

• It changes the state of matter to a liquid

• It creates a new gas that is bubbling out of the liquid

Multiple Choice

A system which can be exchange both matter and energy with the surrounding.

• Close system

• Open system

Multiple Choice

Q. 

True or False

In a chemical reaction there is always ONE product.

• TRUE

• FALSE

Multiple Choice

Is this a chemical or physical change?

• Physical Change

• Chemical Change

Multiple Choice

In combustion reaction what element is always the reactant

• Oxygen

• Carbon

• Gold

• Helium

Multiple Choice

A property that can only be observed when a substance reacts or does not react with another substance

• chemical property

• physical property

Multiple Choice

What evidence supports that this is a PHYSICAL change?

• It creates a new substance

• It changes its shape

• It is started on fire

• Use your own paper

• Write each term and the definition.

• Do NOT shorten the definitions.

​Vocabulary

Multiple Choice

Are these chemical or physical changes?

• Physical Change

• Chemical Change

Multiple Choice

What evidence supports that this is a CHEMICAL change?

• They are the same matter, are not a gas

• Burning stuff is always a chemical change!

• The product has the same properties as the reactant

Multiple Choice

Is this a chemical or physical change?

• Physical Change

• Chemical Change

Multiple Choice

Which of the following represents the amount of matter in an object?

• density

• mass

• volume

Multiple Choice

What evidence supports that this is a PHYSICAL change?

• It creates a new substance

• It changes its shape

• It changes the state of matter

Multiple Choice

How many valance electrons does Te have?

• 52

• 127

• 6

• 5

Multiple Choice

Is this a chemical or physical change?

• Physical Change

• Chemical Change

Multiple Choice

The temperature at which a liquid turns into a gas

• melting poing

• boiling point

Multiple Choice

What evidence supports that this is a PHYSICAL change?

• It creates a new substance

• It changes its shape

• It changes the state of matter

Multiple Choice

Are these chemical or physical changes?

• Physical Change

• Chemical Change

Multiple Choice

If you place a thermometer into a glass of boiling water, what temperature should the thermometer read in degrees Celsius?

• 0

• 32

• 100

• 212

Multiple Choice

What evidence supports that this is a CHEMICAL change?

• A gas is created

• Burning stuff is always a chemical change!

• Its still soda, its just in the pool

Multiple Choice

particles in an atom that are negatively charge

• electron

• proton

• neutron

• nucleus

Multiple Choice

What material from is the reactant in this chemical reaction

• the Soda and Mento candy

• The boy

• the foam

• The pool

Multiple Choice

At what temperature does water freeze?

• 0ᵒC or 32ᵒF

• 0ᵒF or 32ᵒC

• 100ᵒC or 212ᵒF

• 100ᵒF or 212ᵒC

Multiple Choice

Which of the following is NOT an example of a chemical reaction?

• flammability

• oxidation

• reactivity

• melting point

Reactivity -​ A measure of how much a substance reacts when it is mixed with another substance

Reactivity of an element is determined by the number of Valance Electrons.

Multiple Choice

Which of the following is defined as the likelihood of a substance to undergo a chemical reaction?

• oxidation

• rusting

• reactivity

• flammability

Multiple Choice

Which famous US landmark is known for its oxidation?

• Mount Rushmore

• Eiffel Tower

• Disney World

• Statue of Liberty

THEN: Answer the questions on the following slides. Refer to this reading and your vocabulary.

​

​Read This

Multiple Choice

What is the formula for density?

• volume/mass

• volume x mass

• mass/volume

Multiple Choice

Which of the following is NOT a unit of measure for volume?

• grams (g)

• milliliters (mL)

• cubed centimeters (cm³)

Multiple Choice

Reactivity of an element is determined by the number of ________.

• Protons

• Valance Electrons

• Neutrons

• Subatomic Particles

Multiple Choice

An element is?

• Chemically combined

• Pure substances that can be broken down

• Pure substances that cannot be broken down into simpler substances

• One or more elements chemically combined.

Have a FULL outer shell

😃Non-Reactive/Stable Elements

DO NOT have a full outer shell

😡Reactive/Unstable Elements

Reactive vs Non-Reactive

Multiple Select

The weighted average of the atomic masses of the naturally occurring isotopes of an element.

• average atomic mass

• atomic number

• number of isotopes

• mass number

Multiple Choice

_____ elements have a full outer shell of valance electrons?

• Reactive or unstable

• Non-reactive or stable

Multiple Choice

Neutron

• particles in an atom that has no charge

• particles in an atom that is negatively charge

• particles in an atom that is positively charge

Multiple Choice

_____ elements that DO NOT have a full outer shell of valance electrons?

• Reactive or unstable

• Non-reactive or stable

Multiple Choice

A one, two, or three letter representation of the name of an element.

• atomic number

• chemical formula

• chemical symbol

• periodic table

Outer shells are almost full or almost empty.

• Lithium only has 1 VE- Highly Reactive

• Chlorine has 7 VE- Highly Reactive

Highly Reactive Elements

Outer shells are about half way full

• Boron has 3 VE- Less Reactive

• Carbon has 4 VE- Less Reactive

Less Reactive

Multiple Choice

__ is a pure substance containing two or more kinds of atoms.

• Element

• compound

• mixture

• solution

​*All of the Elements in Group 8A are Stable or nonreactive

​

Reactivity is determined by number of Valance Electrons

Multiple Choice

An arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column, or group.

• group

• chemical symbol

• periodic table

• malleable

Multiple Choice

Neon, Ne, is in Group 8a. Is Ne stable or reactive? Why?

• Ne is stable because it the last energy level is full.

• Ne is reactive because it the last energy level is full.

• Ne is stable because it the last energy level is almost full.

• Ne is reactive because it the last energy level is almost full.

The elements in Groups 1, 2, 6 & 7 are highly reactive because the outer shells are almost full

​

Reactivity is determined by number of Valance Electrons

Multiple Choice

In chemistry, a horizontal row of elements in the periodic table.

• metal

• period

• metalloid

• group

Multiple Choice

Which group is more reactive 6a or 7a? Why?

• 6a because it is closer to having a full shell

• 7a because it is closer to having a full shell

• 6a because it has a full outer shell

• 7a because it has a full outer shell

Multiple Choice

The properties of a compound are different from the elements that make them up.

• True

• False

The elements in Groups 3,4 & 5 are less reactive because the outer shells are about halfway full

​

Reactivity is determined by number of Valance Electrons

Multiple Choice

Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements.

• Demitri Mendeleev

• Democritus

• JJ Thompson

• Vladimir Putin

Multiple Choice

Which is the least reactive group?

• 6a

• 4a

• 1a

Multiple Choice

Electrons in the outermost orbital of an atom are called

• Ions

• Covalen bonds

• Ionic bonds

• Valence

Lets compare:

Which element is more reactive, Oxygen (O) or Aluminum (Al)?

Why?

​

Reactivity is determined by number of Valance Electrons

Multiple Choice

An element that conducts heat and electricity poorly.

• metal

• metalloid

• nonmetal

• malleable

Lets compare:

Which element is more reactive, Oxygen (O) or Aluminum (Al)?

Why?

​Because it is closer to having a full outer shell

Reactivity is determined by number of Valance Electrons

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

Use your Periodic Table. Which element is stable or non-reactive?

• Carbon (C)

• Krypton (Kr)

• Sodium (Na)

Multiple Choice

An electron that is found in the outermost shell of an atom and that determines the atom's chemical properties.

• proton

• atom

• valence electron

• cation

Multiple Choice

Use your Periodic Table. Which element is highly reactive?

• Carbon (C)

• Krypton (Kr)

• Sodium (Na)

Multiple Choice

A positive charge will attract a ____________ charge

• Positive

• Negative

• Neutral

Multiple Choice

Use your Periodic Table. Which element is least reactive?

• Carbon (C)

• Krypton (Kr)

• Sodium (Na)

Valance Electrons & Reactivity

Add the reactivity notes to your Periodic Table

Multiple Choice

Oxygen is a

• Element

• Compound

Multiple Choice

An element is a ___ that cannot be separated into simpler substances by physical or chemical means.

• pure substance

• mixture

• solution

• compound

Multiple Choice

All atoms are most stable with (or would "prefer") how many electrons in their valence shell?

• 1

• 2

• 8

• 18

Multiple Choice

Water (H₂O) is a

• Element

• Compound

Multiple Choice

In a stable atom the amount of electrons is electron is equal to

• neutrons

• protons

• atomic mass

• neutrons + protons

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Select

[check all that apply] Mixtures are

• chemically combined

• composed of two or more types of matter that can be present in varying amounts

• One or more elements chemically combined

• can be separated by physical changes

Multiple Choice

A charged atom

• Ion

• Isotope

• Proton

• Electron

Multiple Choice

Which of the diagrams below represent a mixture?

• A

• B

• C

• D

Multiple Choice

Salt (NaCl) is

• Mixture

• Compound

Multiple Choice

If there are more protons than electrons, the

atom is ______ charged.

• positively

• negatively

• neutral

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

If there are more protons than electrons, the

atom is ______ charged.

• positively

• negatively

• neutral

Multiple Choice

Saltwater is

• Mixture

• Compound

Multiple Choice

If there are more electrons than protons, the atom is _______ charged.

• positively

• negatively

• neutral

Multiple Choice

How many different types of atoms are there in the following molecule?

• 7

• 6

• 3

• 8

Multiple Choice

Bonds form because atoms are seeking

• Help

• Relationships

• Stability

• Reactions

Multiple Choice

Chicken noodle soup is

• Homogeneous mixture

• Heterogeneous mixture

Multiple Choice

Ionic bonds

• Share electrons

• Trade electrons

• Borrow electrons

• Transfer electrons

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

Covalent Bonds

• Share electrons

• Trade electrons

• Borrow electrons

• Transfer electrons

Multiple Choice

A bottle of dishwashing detergent contains a clear, viscous liquid. The label has a long list of ingredients, including water, sodium lauryl sulfate, fragrance, and Blue dye #5.

What can you infer about the material in the bottle from this label and the appearance of the liquid?

• It is a pure substance.

• It is a compound.

• It is a heterogeneous mixture.

• It is a homogeneous mixture.

Multiple Choice

How do electrons of an element determine that element's reactivity?

• If the valence shell has missing electrons it is very reactive to attract or lose more electrons.

• If the valence shell has a full ring of electrons it is very reactive because it needs more.

• If the valence shell has a full shell of electrons it is very reactive because it is already full.

• If the valence shell has missing electrons it is not reactive because it is missing electrons.

Multiple Choice

How are elements and compounds different?

• A compound is represented by a chemical formula, and elements are represented by a chemical symbol.

• Compounds are represented by chemical symbols of one letter, and elements are represented by symbols of two letters.

• Elements are pure substances, and compounds are not.

• Elements are always larger units of matter, and compounds are smaller.

Multiple Choice

• 2
• 8
• 3
• 13

Multiple Choice

Pure Substance or Mixture?

made from one type of atom

• pure substance

• mixture

Multiple Choice

• 2
• 3
• 5

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

Pure Substance or Mixture?

can be made from multiple elements that are chemically combined

• pure substance

• mixture

Multiple Choice

How many elements are in the compound Fe₂O₃?

• 0

• 1

• 2

• 3

Multiple Choice

Homogeneous or Heterogeneous?

a mixture that is uniform throughout

• homogeneous

• heterogeneous

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

Pure Substance or Mixture?

Dr. Pepper

• pure substance

• mixture

Multiple Choice

Hydrogen is considered an element, while hydrogen peroxide is considered a compound. This is because hydrogen peroxide is...

• is used for cleaning wounds.

• made of two different elements.

• is a liquid.

• useful to human beings.

Multiple Choice

Pure Substance or Mixture?

neon

• pure substance

• mixture

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

The picture shown here is what type of mixture?

• homogeneous
• hetergeneous
• pure substance
• element

Multiple Choice

The smallest particle of matter

• Element

• Compound

• Atom

• Chemical

Multiple Choice

This diagram represents a _____.

• pure substance that is a compound
• mixture of elements
• pure substance that is an element
• mixture of compounds

Multiple Choice

• element

• compound

• mixture of elements

• mixture of compounds

• mixture of elements and compounds

Multiple Choice

This diagram represents a _____.

• pure substance that is a compound
• mixture of elements
• pure substance that is an element
• mixture of compounds

Multiple Choice

Element or Compound? $$H_{6_{ }}O_5$$  

• Element

• Compound

Multiple Choice

Which of these substances is a compound?

• chlorine
• nitrogen
• uranium
• ammonia

Multiple Choice

Element or Compound? $$O_6$$  

• Element

• Compound

Multiple Choice

Carbon dioxide

• Pure Substance & Element
• Pure Substance & Compound
• Mixture & Homogenous
• Mixture & Heterogenous

Multiple Choice

How many elements? $$C_6H_{12}O_6$$  

• 6

• 12

• 3

Multiple Choice

How many atoms in TOTAL? $$C_6H_{12}O_6$$  

• 6

• 12

• 24

Multiple Choice

An element consists of how many types of atoms?

• None

• 1

• More than 2

• It depends on the element

Multiple Choice

Compounds are formed when

• Atoms break apart

• One atom exists

• More than two atoms bond together

• More than two atoms combine

Multiple Choice

Mixtures can contain which of the following?

• Elements

• Compounds

• Both elements and compounds

Multiple Choice

H2O is an example of a

• Element

• Compound

• Mixture

• Atom

Multiple Choice

What is matter?

• anything that has mass and takes up space

• anything that has volume and is solid

• anything that you can see

Explanation Slide...

Matter is EVERYTHING

Multiple Choice

Is this a compound or element?

• compound

• element

Explanation Slide...

This is the compound Carbon Dioxide (what we breathe out). It is made of the elements Carbon and Oxygen.

Multiple Choice

Is this a compound or element?

• compound

• element

Explanation Slide...

This is a molecule of chlorine - which is an element. When a molecule is only made of one type of atom, it is an element.