Quiz about Chemistry Benchmark Review

Question 1

Unstable atomic nuclei have an imbalance of

Accepted Answer

Protons and neutrons

Answer

Protons and electrons

Answer

Electrons and neutrons

Answer

Neutrons and electrons

Question 2

Where does most of the radiation we encounter come from?

Accepted Answer

Cosmic rays from the sun and the stars

Answer

Tanning beds

Answer

Cosmic rays from other planets

Answer

Only the stars

Question 3

Alpha particle

Accepted Answer

Carries a positive electric charge

Answer

Carries a negative electric charge

Answer

Is a non-visible high energy light wave

Answer

Is two electrons stuck together

Question 4

A Beta particle

Accepted Answer

Carries a negative electric charge

Answer

Carries a positive electric charge

Answer

Is a non-visible high energy light wave

Answer

Carries no charge at all

Question 5

A gamma ray

Accepted Answer

Is a non-visible high energy light wave

Answer

Carries a negative electric charge

Answer

Carries a positive electric charge

Answer

Is two electrons stuck together

Question 6

When an element ejects an alpha particle the atomic number of the resulting element

Accepted Answer

Reduces by 2

Answer

Reduces by 4

Answer

Increases by 2

Answer

Increases by 4

Question 7

Determine the number of protons and neutrons of Radon-200

Accepted Answer

P- 86, N-114

Answer

P-100, N-100

Answer

P-2, N-00

Answer

P-86, N-200

Question 8

Which of the following can be classified as matter?

Accepted Answer

all of the above

Answer

water

Answer

sand

Answer

perfume

Answer

ice cream

Question 9

Chemistry is the study of

Accepted Answer

both A and B

Answer

matter.

Answer

transformations of matter.

Answer

only microscopic phenomena.

Answer

only macroscopic phenomena.

Question 10

The phase in which atoms and molecules no longer move is the

Accepted Answer

solid phase.

Answer

liquid phase.

Answer

gas phase.

Answer

none of the above

Question 11

The diagram on the far left shows the moving particles of a gaseous material within a rigid container. Which of the three boxes on the right best represents this material upon the addition of heat?

Accepted Answer

Box C, because it shows how the particles expand upon the addition of heat.

Answer

Box A, because it shows the gas particles rising upon the addition of heat.

Answer

Box B, because it shows the gas particles moving faster.

Answer

All three of these boxes show accurate representations of what happens to the particles within this rigid container upon the addition of heat.

Question 12

Evaporation is a cooling process and condensation is

Accepted Answer

a warming process.

Answer

a cooling process also.

Answer

neither a warming nor cooling process.

Question 13

When a gas is changed to a liquid phase, it is called

Accepted Answer

condensation

Answer

evaporation

Answer

sublimation

Question 14

The image shows a process taking place. What type of change does this process represent?

Accepted Answer

a chemical change

Answer

a physical change

Answer

an elemental change

Answer

a change in reactivity

Answer

no change

Question 15

Which of the following is an example of a chemical change?

Accepted Answer

gasoline being used in the engine of a car producing exhaust

Answer

water freezing into ice crystals

Answer

aftershave or perfume on your skin generating a smell

Answer

a piece of metal expanding when heated, but returning to original size when cooled

Answer

breaking a glass window

Question 16

Which of the following is an example of a physical change?

Accepted Answer

water boiling and being converted into steam

Answer

water being electrolyzed and being converted in hydrogen and oxygen

Answer

iron metal reacting with oxygen to form rust

Answer

a candy bar being digested by a student

Answer

charcoal being converted into ash

Question 17

Which of the following would be considered a chemical property?

Accepted Answer

reactivity towards water

Answer

melting temperature

Answer

boiling temperature

Answer

conductivity

Answer

flexibility

Question 18

What is the valence shell?

Accepted Answer

It is the last partially filled orbital in an atom.

Answer

It is the outermost shell of electrons in an atom.

Answer

It is the shell of electrons in an atom that is the least reactive.

Answer

It is the shell of electrons in element V (atomic no. = 23)

Answer

It is the same as the orbital configuration.

Question 19

Which of the following is the correct electron dot structure for chlorine?

Accepted Answer

c

Answer

a

Answer

b

Answer

d

Answer

e

Question 20

Which of the following is the correct electron dot structure for carbon (atomic no. = 6)?

Accepted Answer

e

Answer

a

Answer

b

Answer

c

Answer

d

Question 21

How many valence electrons does boron (B, atomic no. = 5) have?

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Answer

5

Question 22

Which of the following elements has two valence electrons?

Accepted Answer

Mg

Answer

Na

Answer

H

Answer

Ne

Answer

Li

Question 23

An atom loses an electron to another atom. Is this an example of a physical or chemical change?

Accepted Answer

chemical change involving the formation of ions

Answer

physical change involving the formation of negative ions

Answer

chemical change involving the formation of neutral atoms

Answer

physical change involving the formation of positive ions

Question 24

Which of the following elements will most likely form an ion with a -1 charge?

Accepted Answer

Cl

Answer

Na

Answer

B

Answer

O

Answer

F

Question 25

Which of the following elements will most likely form an ion with a -2 charge?

Accepted Answer

S

Answer

Na

Answer

Ne

Answer

Mg

Answer

Cl

Question 26

If a neutral atom loses one electron, what is the electrical charge of the atom?

Accepted Answer

+1

Answer

-1

Answer

-2

Answer

+2

Answer

neutral

Question 27

Which of the following best describes ionic bonding?

Accepted Answer

one atom giving up some of its electrons to another atom

Answer

two atoms sharing a set of electrons

Answer

two atoms exchanging a set of electrons

Answer

when two elements with same charge are held together by electrostatic forces

Answer

none of the above

Question 28

If the following generic atom were to undergo ionization, what would be the charge of the most likely product?

Accepted Answer

-2

Answer

+2

Answer

-6

Answer

+6

Answer

would probably not ionize

Question 29

Which of the following is a mixture?

Accepted Answer

air

Answer

gold

Answer

salt

Answer

iron

Answer

helium

Question 30

A chemical reaction occurs:

Accepted Answer

when one or more new compounds are formed by rearranging atoms

Answer

when a new element is formed by rearranging nucleons

Answer

when two solids mix together to form a heterogeneous mixture

Answer

when two liquids mix to form a homogeneous mixture

Answer

when a liquid undergoes a phase change and produces a solid

Question 31

What is a chemical equation?

Accepted Answer

It is a shorthand notation for illustrating a chemical reaction.

Answer

It is the sum of the masses of the products and reactants.

Answer

It is the chemical combination of equal numbers of reactants and products.

Answer

It is a picture of the atoms undergoing a chemical equalization.

Answer

It is any type of reaction that takes place at the equator.

Question 32

For the following balanced equation, which has the highest coefficient?

Accepted Answer

CH4

Answer

H2

Answer

C

Answer

H4

Answer

none of the above

Question 33

Balance these equations.

Accepted Answer

2, 2, 5

Answer

2, 2, 3

Answer

3, 3, 2

Answer

3, 1, 2

Question 34

What is an exothermic reaction?

Accepted Answer

all of the above

Answer

It is a reaction that requires heat as a reactant.

Answer

It is a reaction where the products have more energy than the reactants.

Answer

It is a reaction where there is a net loss of energy from a reaction.

Answer

none of the above

Question 35

What is an endothermic reaction?

Accepted Answer

It is a reaction where there is a net absorption of energy from a reaction.

Answer

It is a reaction that requires heat as a reactant.

Answer

It is a reaction where the products have more energy than the reactants.

Answer

all of the above

Answer

none of the above

Question 36

What is a reaction rate?

Accepted Answer

It is the speed at which reactants are consumed or product is formed.

Answer

It is the balanced chemical formula that relates the number of product molecules to reactant molecules.

Answer

It is the ratio of the masses of products and reactants.

Answer

It is the ratio of the molecular masses of the elements in a given compound.

Answer

none of the above

Question 37

What is the activation energy?

Accepted Answer

the minimum amount of energy to break the bonds in reactants

Answer

the amount of energy required to activate a phase change

Answer

the energy difference between the reactants and the products

Answer

the amount of energy required to separate reactants from the products

Answer

the hill

Question 38

Which of the following solutions is the most acidic?

Accepted Answer

a solution with a pH = 4

Answer

a solution with a pH = 14

Answer

a solution with a pH = 10

Answer

a solution with a pH = 7

Answer

all of the solutions are basic.

Question 39

Which of the following solutions is the most basic?

Accepted Answer

a solution with a pH = 14

Answer

a solution with a pH = 10

Answer

a solution with a pH = 7

Answer

a solution with a pH = 4

Question 40

Which of the following solutions is neutral?

Accepted Answer

a solution with a pH = 7

Answer

a solution with a pH = 14

Answer

a solution with a pH = 10

Answer

a solution with a pH = 4

Answer

All of the solutions are basic.

Question 41

What does pH stand for?

Accepted Answer

Power of Hydrogen

Answer

Production of Hydrogen

Answer

Power of Hydronium acid

Answer

Production of Helium

Answer

Power of Helium

Question 42

What is the primary function of neutrons in an atom?

Accepted Answer

To provide mass to the atom without adding charge

Answer

To generate electrical energy within the atom

Answer

To repel electrons and keep them in orbit

Answer

To attract protons and maintain the nucleus structure

Question 43

Which of the following is a characteristic of ionic bonds?

Accepted Answer

Transfer of electrons from one atom to another

Answer

Sharing of electron pairs between atoms

Answer

Equal distribution of electrons in the outer shell

Answer

Formation without the involvement of valence electrons

Question 44

What happens to the energy level of an electron when it moves from a lower to a higher energy orbit?

Accepted Answer

It increases

Answer

It decreases

Answer

It remains the same

Answer

It becomes zero

Question 45

Which phase change occurs when a solid turns directly into a gas?

Accepted Answer

Sublimation

Answer

Condensation

Answer

Deposition

Answer

Evaporation

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