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WorksheetsScience Final Exam
Total questions: 82
Worksheet time: 48mins
T/F: Atoms form molecules that range in size from two to thousands of atoms.
True
False
A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
Ion
Isotope
Molecule
Proton
Oxygen has an atomic number of what?
3
6
7
8
All matter is made of what?
Energy
Atoms
Compounds
Hydrogen
An atom with an atomic number of three would have how many protons?
3
6
12
Can´t be determined
In the modern periodic table, elements are arranged by what?
Atomic number
Number of isotopes
Atomic mass
Valance electrons
T/F: All substances are made from some 118 different types of elements.
True
False
Hydrogen has an atomic number of what?
2
6
1
8
Atoms of the same element that have different numbers of neutrons are called what?
Isotopes
Ions
Electron
Proton
_______ is an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
Isotope
Ion
Electron
Proton
Vertical columns on the periodic table are called what?
Periods
Groups or families
Atomic numbers
Atomic masses
Horizontal rows on the periodic table are called what?
Periods
Groups or families
Atomic numbers
Atomic masses
What is the number of neutrons in a neutral atom of Bromine?
35
15
10
45
To determine the number of valance electrons an element has, you look at the ______ on the periodic table.
Period
Atomic number
Group/family
Atomic mass
How many neutrons in a neutral atom of chlorine?
17
35
18
12
______ denotes electrons involved in or available for chemical bond formation.
Atomic number
Valence
Atomic mass
Period
The number of valence electrons in helium.
0
8
1
2
The number of valence electons in Nitrogen.
5
15
31
10
An isotope of Carbon-13 would have how many neutrons.
15
7
8
1
If lithium, Li1, and oxygen, O2, combine, what will the resulting chemical formula be for this ionic bond. (2 answers)
Li2O
Lithium Oxide
Carbon dioxide
C2H2O
Draw a Lewis Dot diagram for Silicon
Fill in the Bohr diagram
A heterogeneous mixture is....
A substance that is only made of one type of atom or molecule.
A non-uniform mixture of two or more smaller parts.
A uniform mixture that cannot be separated into component parts.
A mixture where two or more substances combine uniformly.
A homogenous mixture is....
A substance that is only made of one type of atom or molecule.
A non-uniform mixture of two or more smaller parts.
A uniform mixture that cannot be separated into component parts.
A mixture where two or more substances combine uniformly.
T/F: A solution is a type of homogeneous mixture.
True
False
An extended structure is what?
Many molecules of the same element organized and held together by chemical bonds.
A type of solution.
A type of mixture.
A type of substance containing only one atom.
T/F: A solution is said to be super-saturated when it has more solute than it can dissolve.
True
False
Ductility is......
A change in a substance that doesn´t change what the substance is.
The ability of a substance, usually a metal, to be deformed or molded into a different shape.
A change where there is a chemical reaction, a new substance is formed, and energy is either given off or absorbed.
A measure of a
metal´s ability to withstand tensile stress-any force that pulls the two ends of a material away from each other.
Conductivity is...
The ability of a substance to be stretched.
The ability of a substance to be molded or deformed.
How chemically reactive a substance is.
The ability or power to conduct, or transmit heat, electricity, or sound.
Gold has a density that is....
less than water
the same as water
greater than water
A physical change is
A change in a substance that does change the chemical makeup of a substance.
A change in a substance that does not change the chemical makeup of a substance.
A chemical change is....
a change where there is a chemical reaction and a new substance is formed
a change in a substance where there is no change to the properties of that substance.
T/F: A phase change (change of state) of a substance is considered a chemical change.
True
False
T/F: In general, solids are less dense than liquids because their molecules are closer together.
True
False
T/F: Acidity (pH) is considered a chemical property of a substance.
True
False
Physical proprieties
Large quantities of a substance
Characteristics that can be observed or measured without changing the substance, such as color, melting point, or conductivity.
Characteristics that can only be observed or measured when atoms of matter rearrange during a chemical change.
The process by which one or more substances change to produce one or more different substances.
Crystals are...
A type of diamond
A mixture of non-uniform structures.
Extended structures where the molecules are not arranged in a pattern
Extended structures where the molecules are arranged in a pattern
Which of the following is not a phase change?
Melting
Corrosion
Boiling
Deposition
Freezing
Ice has a density that is...
Less than water
The same as water
Greater than water
Which of the following is the minor component of a solution?
Solvent
Solute
The pH scale is....
The amount of solubility a solution has
Measure of how conductive a solution is
The measure of the amount of Hydrogen or Hydroxide ions in a solution
The amount of Potassium ions in a solution
T/F: A solution with a pH of 2 is a strong base
True
False
Malleability is...
The ability of a substance, usually a metal, to be deformed or molded into a different shape
The ability of a metal to withstand tensile stress
A change in a substance that doesn´t change what the substance is
Property that changes the chemical nature of matter
All of the following are properties of metals except...
Good conductors of heat and electricity
Usually brittle
High luster
Malleable
T/F: Chemical properties are characteristics that can only be observed or measured when atoms of matter rearrange during chemical change.
True
False
Melting point is....
The temperature at which a liquid starts to change to a solid
Temperature at which a solid starts to change to a liquid
Temperature at which a solid starts to change to a gas
Temperature at which a liquid starts to change to a gas
Which of the following shows evidence of a chemical reaction?
An ice cube turns to a liquid in the presence of heat
A nail turns red in the presence of oxygen
Water turns red when mixed with Kool-Aid
Paper changes its shape when cut
The concentration of matter in an object is...
Density
Weight
Volume
Mass
The best way to separate a salt and water mixture is to...
Using a filter
Condensation
Evaporation
Using a screen
A solvent is...
The component of a solution that changes its state
The minor component of a solution
The liquid in which a solute is dissolved to form a solution, the major component of a solution
The component of a solution that is present in a small amount
Natural resources are...
Made by humans using methods different than those nature uses
All the land, forests, energy sources, and minerals existing naturally in a place that can be used by people
Any substance found in a lab
All substances are natural resources
Students were asked to separate a mixture of salt and sand. One group decides to put the mixture into a beaker of water first. Which of the following should they do next to separate out the salt and the sand?
Use a magnet to pull the sand from the water, then freeze the water
Let the water stand until the sand settles to the bottom and the salt floats to the top
Boil the water from the sand and collect the vapor, which will have salt
Pour the water through filter paper to remove the sand, then evaporate the water
T/F: In general, solids are less dense than liquids because their molecules are closer together.
True
False
When molecules form a regular repeating pattern, it is called a(n)...
Crystalline solid
Gas
Liquid
Amorphous solid
A liquid can also be called a...
Crystalline solid
Gas
Fluid
Amorphous solid
Intermolecular forces are...
Attractive forces between seprate molecules
Forces that hold molecules together
Much weaker than chemical bonds
All of these
Which of the following is an example of a crystalline solid?
Rubber
Plastic
Glass
Salt
Which of the following is an example of an amorphous solid?
Rubber
Sugar
Snowflake
Salt
_______ have no fixed volume and no fixed shape
Solids
Liquids
Gases
Surface tension
What are the most common states of matter on earth?
Solids
Liquids
Gases
Plasmas
____ have a fixed volume, but take the shape of a container
Solids
Liquids
Gases
Plasmas
____ have a fixed volume and a fixed shape
Solids
Liquids
Gases
Plasmas
T/F: Surface tension is caused by the inward intermolecular pull of the molecules that make up a liquid.
True
False
A liquid´s resistance to flow is called...
Surface tension
Condensation
Viscosity
Fusion
Which of the following is an example of a liquid with a low viscosity?
Corn syurp
Water
Honey
Oil
As thermal energy is added to a substance, which of the following changes can be predicted?
Spacing between the particles will decrease
Temperature of the substance will decrease
Vibration of the individual particles will increase
The pressure of the air around the substance will increase
T/F: A phase change is a type of chemical change that cannot be undone.
True
False
When particles in a gas lose enough thermal energy to turn into a liquid
Condensation
Evaporation
Sublimation
Melting
Occurs when the surface particles of a solid gain enough energy that they form a gas
Deposition
Sublimation
Melting
Freezing
T/F: When a substance freezes, the particles gain energy
True
False
In which state of matter are molecules moving the fastest?
Solid
Liquid
Gas
Solids move equally fast in all states of matter
A substance that flows
Solid
Surface tension
Fluid
Viscosity
T/F: Thermal energy is the internal energy of an object due to the kinetic energy of its atoms and/or molecules
True
False
Which of the following statements best describes the relationship between temperature and kinetic energy of particles in a substance.
As kinetic energy decreases, temperature is not affected
As kinetic energy increases, temperature is not increases
As kinetic energy increases, temperature decreases
As kinetic energy decreases, temperature increases
Solids that are made up of crystals are called...
Crystalline solids
Gases
Amorphous solids
Liquids
The change of state from a liquid to a solid
Freezing
Fusion
Condensation
Melting
The temperature at which a liquid boils
Melting point
Boiling point
Freezing point
Sublimation
when the temperature of matter decreases, the particles
Slow down and move farther apart
Slow down and move closer together
Speed up and move farther apart
Speed up and move closer together
Which of the following changes made to a sample of liquid would result in an increase in the distance between the individual molecules of the substance?
Transferring the substance to a smaller container
Changing the phase of matter from a liquid to solid
Decreasing the overall kinetic energy of the liquid
Adding heat to the substance
A box with a mass of 20 kg and a volume of 2 L has a density of...
20 kg/L
10 kg/L
2 kg/L
5 kg/L
A cube with a width of 10 cm and a mass of 4,000 kg has a density of...
4 kg/cm³
2 kg/cm³
100 kg/cm³
2500 kg/cm³
A rectangular box with a width of 5 cm, a length of 10 cm, and a height/depth of 2 cm and a mass of 100 kg has a density of...
100 kg/cm³
50 kg/cm³
1 kg/cm³
5 kg/cm³
