Question 1

In this reaction the items on the left side of the equation are

Accepted Answer

reactants

Answer

products

Question 2

In this reaction the items on the right side of the equation are

Accepted Answer

products

Answer

reactants

Question 3

In this chemical reaction, the reactants are classified as what?

Accepted Answer

1 compound

Answer

2 compounds

Answer

3 compounds

Question 4

Is this an element, compound, or mixture?

Accepted Answer

element

Answer

mixture

Answer

compound

Question 5

Is this an element, compound, or mixture?

Accepted Answer

compound

Answer

mixture

Answer

element

Question 6

Is this an element, compound, or mixture?

Accepted Answer

mixture

Answer

compound

Answer

element

Question 7

Study the columns of the table. Which of the following is the correct set of labels for columns #1 and #2?

Accepted Answer

Column 1 is Elements, and Column 2 is Compounds

Answer

Column 1 is Atoms, and Column 2 is Mixtures

Answer

Column 1 is Compounds, and Column 2 is Elements

Question 8

Which of following is a compound?

Accepted Answer

NaCl

Answer

Fe

Answer

Pb

Answer

Ni

Question 9

Which of the following is an element?

Accepted Answer

D

Answer

C

Answer

B

Answer

A

Question 10

Which one is not an element?

Accepted Answer

NaCl

Answer

He

Answer

Co

Answer

H

Question 11

What is the best name for atoms of two different elements that are bonded together?

Accepted Answer

Compound

Answer

Mixture

Answer

Element

Question 12

What is the definition of an element?

Accepted Answer

Pure substance

Answer

Two or more substances chemically bonded together

Answer

Substance that can be physically separated.

Question 13

Why is carbon considered to be an element, but carbon dioxide is classified as a compound?

Accepted Answer

Carbon dioxide has two different elements.

Answer

Carbon is found in living matter.

Answer

People exhale carbon dioxide.

Answer

Carbon dioxide is a gas.

Question 14

Which substance from the equation above is an element?

Accepted Answer

J

Answer

H

Answer

G

Answer

F

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