Phy Science Final Exam Review

Physical Science
Final Exam Review

What is on the Final?

1. Periodic Table and Atomic Structure 14 questions x 2 pts = 28 pts

   1. Periodic Table Organization

   2. Atomic Structure

      1. Protons/Neutrons/Electrons

      2. Atoms/Ions/Isotopes

2. Chemical Reactions 4 questions x 2 pts = 8 pts

   1. Writing and Balancing Equations

3. Moles & Molar Conversions 2 questions x 4 pts = 8 pts

   1. Moles to grams, gr to moles

4. Energy 4 questions x 5 pts = 20 pts

5. Newtons Laws 4 Questions x 2 pts = 8 pts

6. Essay (Chem Eqns & Reaction types) 2 questions x 5 pts = 10 pts

7. Last Question Easy 18 pts

Periodic Table & Atomic Structure

​14 questions x 2 pts each = 28 pts

• PT Organization

• Atomic Structure - Atomic Number, Atomic Mass,

• Atoms / Ions / Isotopes

Multiple Choice

What is a group

• Up and down row on the table

• Up and down column on the table

• Side to side row on table

• Side to side column on the table

Multiple Choice

What is a period

• Up and down row on the table

• Up and down column on the table

• Side to side row on table

• Side to side column on the table

Multiple Choice

What group is carbon in?

• 1

• 2

• 13

• 14

• 15

Multiple Choice

Are the alkline earth metals more or less reactive than the alkali metals

• More

• Less

Multiple Choice

Which element is a Halogen?

• Argon

• Iodine

• Calcium

• Sodium

Multiple Choice

Which element is a Noble Gas?

• Neon

• Chlorine

• Sodium

• Phosphorus

Multiple Choice

Group 1

• Alkali Metals

• Alkaline Earth Metals

• Rare Earth Metals

• Noble Gases

• Halogens

Multiple Choice

Group 17

• Alkali Metals

• Alkaline Earth Metals

• Rare Earth Metals

• Noble Gases

• Halogens

Multiple Choice

Alkali Metals have how many valence electrons

• 1

• 2

• 6

• 8

Multiple Choice

Halogens have how many valence electrons

• 1

• 2

• 7

• 8

Multiple Choice

Noble Gases have how many valence electrons

• 1

• 2

• 6

• 8

​Valence electrons:

​The electrons in an atom’s outermost orbitals; determine the chemical properties of an element.​

-Each group of representative elements (1,2, 13-18) have an assigned amount of valence electrons.

Multiple Choice

What charge of ion will Chlorine form?

• 1-

• 1+

• 7-

• 2-

Multiple Choice

What charge of ion will Sodium form?

• 1-

• 1+

• 7-

• 2-

Day 1

1. What are the sub-atomic particles?

   1. Where do they live?

   2. What is their relative mass?

   3. What is their charge?

2. What is Atomic Number?

3. What is Mass Number?

4. What is an Isotope

5. What is an Ion

Multiple Choice

The negatively charge (-) particle of an atom.

• proton

• electron

• neutron

Multiple Choice

The no charge (n0) particles of an atom.

• Proton

• Electron

• Neutron

Multiple Choice

The positively charge (+) particles of an atom

• Proton

• Electron

• Neutron

Multiple Choice

Protons and neutrons are found inside nucleus

• True

• False

Multiple Choice

The dense, positively charged mass located in the center of the atom.

• nucleus

• proton

• isotope

• molecule

​The number of Protons DEFINES the element.

Helium has 2 PROTONS. Helium will never have 3 protons. If it did...it would be LITHIUM!

Multiple Choice

The atomic number of Hydrogen (H) is

• 1

• 2

• 3

• 4

Multiple Choice

The atomic number of Nitrogen (N) is

• 7

• 6

• 8

• 9

Multiple Choice

The atomic number of Cobalt (Co) is

• 27

• 26

• 25

• 24

​An ATOM is Neutral. That means it has no charge.

​So...It has to have the same number of electrons as it has protons!

​P +1

e -1

Net Charge is 0

​So atoms will have the same number of ELECTRONS as they do PROTONS!

Multiple Choice

How many electrons does a neutral atom of Nitrogen have?

• 14

• 7

• 8

• 6

Multiple Choice

What is the charge of a proton, and what is its location in an atom?

• Neutral charge, located in nucleus.

• Positive charge, located in nucleus.

• Neutral charge, located in the orbitals/cloud.

• Positive charge, located in the orbitals/cloud.

Multiple Choice

WHAT IS THE ATOMIC NUMBER OF OXYGEN?

• 16

• 8

• 15.9999

• 9

​What is an Isotope?

​Isotopes have the same number of protons (so they are the same element)

​But different numbers of Electrons

Isotope Symbols

As you can see to the right there are certain ways elements and isotopes are represented as symbols. There is the element symbol (the biggest part). Then the upper number will the the mass number (number of protons + number of neutrons) and the lower number is just the atomic number (number of protons).

Multiple Choice

You find out that an atom has 5 protons, 6 neutrons, and 5 electrons. What is this atom's atomic number?

• 5

• 6

• 11

• 1

Average Atomic Mass

• DIFFERENT than Mass Number

• Average of all of the isotopes of an atom found in nature.

Multiple Choice

What is the atomic number of Nitrogen

• 7

• 14

• 28

• 5

Multiple Choice

What is the atomic number of carbon

• 18

• 12

• 5

• 6

Multiple Choice

What is the atomic mass of carbon

• 6 g/mole

• 12 g/mole

• 18 g/mole

• 23 g/mole

Chemical Reactions

​4 Questions x 2 Pts each = 8 Pts

Writing Chemical Equations
Balancing Chemical Equations
Types of Chemical Reactions

Writing Chemical Equations

​8E: Write and balance chemical equations using the law of conservation of mass.

​DIATOMIC ELEMENTS

Multiple Select

Which of the following elements are considered diatomic? Check all.

• Phosphorous

• Nitrogen

• Iodine

• Carbon

Drag and Drop

Translate the word equation below:

Nitrogen reacts with Hydrogen to form Ammonia (NH₃).

​

Placeholder

+ ​

Placeholder

$$\rightarrow$$ ​

Placeholder

Drag these tiles and drop them in the correct blank above

N2

H2

NH3

N

H

Drag and Drop

Which is the correct chemical equation for the following: Solid Zn reacts with silver (I) chloride to produce Zinc (II) chloride and silver metal

​

Placeholder

​ + ​ ​

Placeholder

$$\rightarrow$$ ​ ​

Placeholder

+ ​

Placeholder

Drag these tiles and drop them in the correct blank above

Zn

AgCl

ZnCl2

Ag

Zn2

Ag2Cl

Zn2Cl

Drag and Drop

Magnesium can be burned in oxygen to produce solid magnesium oxide.

​

Placeholder

+ ​

Placeholder

$$\rightarrow$$ ​

Placeholder

Drag these tiles and drop them in the correct blank above

Mg

O2

MgO

Mg2

O

Mg2O2

Mg02

Drag and Drop

Sodium reacts with chlorine gas to produce sodium chloride.

​

Placeholder

+ ​

Placeholder

$$\rightarrow$$ ​

Placeholder

Drag these tiles and drop them in the correct blank above

Na

Cl2

NaCl

Na2

Cl

Na2Cl

Na2Cl2

NaCl2

Multiple Choice

Which is the correct chemical equation for the following: Barium Chloride combined with sodium sulfide yields barium sulfide and sodium chloride

• BaCl + NaS → BaS+ NaCl

• BaCl₂ + Na₂S → BaS+ NaCl

• BaS+ NaCl → BaCl + NaS

• BaCl₂ + Na₂S → BaS+ NaCl₂

2H₂ + O₂ ---> 2H₂O

This equation is BALANCED on both sides.

Notice that there are 4 Hydrogens and 2 Oxygens on each side.

The full-size numbers to the LEFT of the elements/compounds are called COEFFICIENTS and are the ONLY VALUES YOU CAN CHANGE.

The small numbers to the right of the elements are called SUBSCRIPTS and MUST STAY THE SAME in the equation.

In this example, we want the number of Mg (Magnesium) on the LEFT of the arrow to be the same on the RIGHT of the arrow.

We also want the number of O (Oxygen) to be the same number on both the LEFT and RIGHT of the arrow.

Once we count up the Mg and O on both sides, we can see what needs to change.

We CANNOT TAKE ANYTHING AWAY.

We can ONLY ADD using coefficients.

You'll see this done in the next slide...

Multiple Choice

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Multiple Choice

Is the following equation balanced?

Al + O₂ ---> 2Al₂O₃

• YES

• NO

Multiple Choice

What coefficients are needed to balance the equation?

___Al + ___ O₂ ---> 2Al₂O₃

• 3,2

• 3,4

• 4 , 3

• 4,2

Multiple Choice

What coefficients are needed to balance the following chemical equation?

__H₂O → __H₂ + __O₂

• 1, 1, 1

• 2, 2, 2

• 2, 2, 1

• 2, 2, 3

Multiple Choice

What coefficients are needed to balance the following chemical equation?

__Zn + __HCl → __ZnCl₂ + __H₂

• 1,1,1,1

• 1,2,1,1

• 2,1,2,2

• 2,1,2,1

Multiple Choice

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

• yes
• no

Types of Chemical Reactions

Access Types of Chemical Reactions Notes from Google Drive!

Multiple Choice

A decomposition reaction can be represented as _____________________.

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC

Multiple Choice

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃  + H₂O

• Decomposition
• Combustion
• Synthesis
• Single Replacement 

Multiple Choice

What type of reaction involves 2 substances combining to form 1 new compound?

• Decomposition Reaction

• Single Displacement Reaction

• Double Displacement Reaction

• Synthesis Reaction

Multiple Choice

2Na +S → Na₂S

• Double Replacement

• Decomposition

• Combustion

• Synthesis

Multiple Choice

This pictures simulates what type of reaction?

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

Multiple Choice

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Multiple Choice

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Multiple Choice

What reaction has the following general formula:

A + CD --> C + AD

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

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

• Combination

• Decomposition

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

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

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

Energy

​GPE & KE

Math Response

A 16-kg barbell is now 0.5 m above the floor. What is it's Gravitational Potential Energy in Joules?

Type answer here

Correct Answer: 80

Deg^°

Rad

Multiple Choice

What kind of energy would you find in an object high above the ground?

• Gravitational Potential

• Kinetic

• Thermal

• Chemical

Multiple Choice

An 2 kg apple is hanging in a tree, 10 ft off the ground. What is the gravitational potential energy of the apple?

• 19.6 J
• 20 J
• 98 J
• 196 J 

Multiple Choice

At which point is potential energy greatest?

• W
• X
• Y
• Z

Math Response

Calculate the gravitationals PE of a 2.5 kg monkey hanging from a branch 7 m above the jungle floor

GPE = 2.5 x 9.8 x 7m = ___J

Type answer here

Correct Answer: 171.5

Deg^°

Rad

Math Response

Use the formula KE = 0.5 x mass x velocity x velocity

how much KE in a 0.15 kg baseball the is thrown at 35 m/s

KE = 0.5 x 0.15kg x 35 m/s x 35 m/s

Type answer here

Correct Answer: 91.875

Deg^°

Rad

What is the kinetic enrgy of a 44 kg cheetah running at a speed of 31 m/s

Use Formula KE = 0.5 x m x v x v

​

​Calculate Kinetic energy

Forces LT5 - Newton's 2nd Law Calculations

Physical Science 9A

Open Ended

A baseball accelerates downward at 9.8 m/s2. With negligible air resistance and a net force of 1.4 N, what is the baseball’s mass?

$$F=ma$$  

Multiple Choice

An object accelerates 8 m/s² when a force of 40 newtons is applied to it. What is the mass of the object?

• 4 kg

• 20 kg

• 0.2 kg

• 5 kg

Multiple Choice

When force is 20 N, mass is 5 kg, what is acceleration?

F = ma

• 25 m/s²

• 100 m/s²

• 5 m/s²

• 4 m/s²

Multiple Choice

An object of mass 10 kg is accelerated upward at 2 m/s². What force is required?

• 20 N

• 5 N

• 2 N

• 0 N

Multiple Choice

Which object has greater inertia?

Multiple Choice

What is inertia?

• Inertia is an object’s resistance to change in motion.

• Inertia is anything that makes a moving object slow down or stop.

Multiple Choice

What will happen to an object if it is put into motion in space?

• It will stop eventually due to friction.

• It will continue to move until it is acted on by an unbalanced force.

• It will speed up over time.

• It will slow down over time.