Quiz about RE Chemical Reactions & Atomic Structure REVIEW

Question 1

Based on its location on the partial periodic table shown above, which element would you predict has chemical properties that are most similar to argon (Ar)?

Accepted Answer

B. Helium (He)

Answer

A. Chlorine (Cl)

Answer

C. Nitrogen (N)

Answer

D. Zinc (Zn)

Question 2

Select all of the following events in which a chemical change occurs.

Accepted Answer

Sugar is heated until it turns into a brown caramel sauce.

Accepted Answer

Two unknown liquids are mixed together and a gas is produced.

Accepted Answer

Toast is lightly charred in a toaster.

Answer

Chocolate syrup dissolves into warm milk.

Answer

A piece of paper is cut up into 12 pieces.

Question 3

What atoms combine to make up a molecule of water?

Accepted Answer

2 hydrogen, 1 oxygen

Answer

1 hydrogen, 1 oxygen

Answer

1 hydrogen, 2 oxygen

Answer

2 hydrogen, 2 oxygen

Question 4

Calcium carbonate, a common material found in chalk and antacids, is shown decomposing in the balanced chemical equation below. Count the number of atoms on the reactant and product side of the equation. How many more atoms are in the products than the reactants?

Accepted Answer

1

Answer

0

Answer

2

Answer

3

Answer

4

Question 5

What three fundamental particles are atoms made of?

Accepted Answer

protons

Accepted Answer

electrons

Accepted Answer

neutrons

Answer

molecules

Answer

carbon

Question 6

Which of the following correctly summarizes the process of ice turning into water and then into steam?

Accepted Answer

a solid to a liquid to a gas

Answer

a liquid to a solid to a gas

Answer

a solid to a gas to a liquid

Answer

a liquid to a gas to a solid

Answer

a gas to a liquid to a solid

Question 7

A student creates a ball-and-stick model to represent the atomic scale of a substance. Which of these best describes the model?

Accepted Answer

1 molecule with 10 atoms

Answer

1 element with 10 molecules

Answer

10 molecules representing 10 elements

Answer

10 elements representing 10 molecules

Question 8

Identify the type of transformation that has taken place.

Accepted Answer

B) Physical Transformation

Answer

A) Chemical Transformation

Question 9

What type of change occurred?

Accepted Answer

B) Physical Change

Answer

A) Chemical Change

Question 10

Graphite and diamond are both made of carbon but their properties are very different as can be seen in the picture below. If they're made of the same thing, why do they have such different properties?

Accepted Answer

they have different molecular structures

Answer

the carbon atoms in graphite have less protons which makes it softer

Answer

the carbon atoms in diamond have more protons which make it stronger

Answer

graphite is made up of dark carbon atoms

Question 11

Which three of the following can the Periodic Table be used for?

Accepted Answer

finding a list of elements

Accepted Answer

if an element occurs naturally

Accepted Answer

the symbols used to identify each element

Answer

what it can combine with to make a chemical

Answer

to find out when each element was discovered

Question 12

The balanced chemical equation of hydrogen peroxide decomposing is shown below. Select all correct statements about it. $$2H_2O_2(l) \rightarrow O_2(g) + 2H_2O(l)$$

Accepted Answer

A) There are two peroxide molecules on the reactant side.

Accepted Answer

B) There are eight atoms in the reactants.

Accepted Answer

E) Mass must be conserved so there are an equal number of atoms in the reactants and products.

Answer

C) There are two atoms on the reactant side.

Answer

D) Mass must be conserved so there are an equal number of molecules in the reactants and products.

Question 13

The balanced chemical equation below shows the decomposition of water into hydrogen and oxygen gas. $$2H_2O(l) \rightarrow O_2(g) + 2H_2(g)$$ Part B: How many atoms are in the products?

Accepted Answer

C) 6

Answer

A) 2

Answer

B) 4

Answer

D) 8

Question 14

Consider the reaction of sodium and water below and select all the correct statements about it. $$2Na(s) + 2H_2O(l) \rightarrow 2NaOH(aq) + H_2(g)$$

Accepted Answer

There are more sodium atoms in the reactants than in the products.

Accepted Answer

Mass is conserved throughout the reaction.

Answer

There are more hydrogen atoms in the reactants than in the products.

Answer

There are as many atoms in the reactants as there are in the products.

Answer

There is more hydrogen gas in the products than in the reactants.

Question 15

Which of the following are represented by these diagrams?

Accepted Answer

two different compounds

Answer

two different elements

Answer

two different forms of the same mixture

Answer

two different forms of the same compound

Question 16

Which of the following correctly classifies the elements as Metal, Metalloids, or Nonmetal? A. Arsenic - Metal, Boron - Metalloid, Germanium - Nonmetal B. Arsenic - Metalloid, Boron - Metalloid, Germanium - Metalloid C. Arsenic - Metalloid, Boron - Nonmetal, Germanium - Metalloid D. Arsenic - Nonmetal, Boron - Metal, Germanium - Metalloid

Accepted Answer

C. Arsenic - Metalloid, Boron - Nonmetal, Germanium - Metalloid

Answer

A. Arsenic - Metal, Boron - Metalloid, Germanium - Nonmetal

Answer

B. Arsenic - Metalloid, Boron - Metalloid, Germanium - Metalloid

Answer

D. Arsenic - Nonmetal, Boron - Metal, Germanium - Metalloid

Question 17

How many protons are in a neutral atom of carbon?

Accepted Answer

6

Answer

2

Answer

4

Answer

8

Question 18

Where do you find electrons? Check all that apply.

Accepted Answer

Electrons cloud

Accepted Answer

Outside the nucleus

Answer

Nucleus

Question 19

What is the charge of a neutron?

Accepted Answer

Neutral/no charge

Answer

Positive

Answer

Negative

Question 20

When atoms combine, they may gain, lose, or share:

Accepted Answer

electrons

Answer

protons

Answer

neutrons

Answer

nuclei

Question 21

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

Accepted Answer

B) Rusting of iron

Answer

D) Dissolving sugar in water

Answer

A) Melting of ice

Answer

C) Boiling of water

Question 22

Which of the following elements is a noble gas?

Accepted Answer

C) Neon

Answer

A) Oxygen

Answer

B) Nitrogen

Answer

D) Hydrogen

Question 23

Which of the following elements is classified as a metalloid?

Accepted Answer

A) Silicon

Answer

B) Oxygen

Answer

D) Helium

Answer

C) Iron

Question 24

What is the primary difference between a chemical change and a physical change?

Accepted Answer

B) Chemical changes result in new substances, while physical changes do not.

Answer

D) Physical changes result in new substances, while chemical changes do not.

Answer

A) Chemical changes involve a change in state, while physical changes do not.

Answer

C) Physical changes involve a change in temperature, while chemical changes do not.

Question 25

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

Accepted Answer

B) Freezing of water

Answer

A) Burning of wood

Answer

C) Rusting of iron

Answer

D) Baking a cake

RE Chemical Reactions & Atomic Structure REVIEW

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science