Compounds

Which statements correctly describe a compound?

• It is a pure substance.

• It is an impure substance.

• It is made up of only one element.

• It is made up of two or more elements.

• The elements in a compound are chemically combined in a fixed ratio.

Carbon dioxide is a compound.

How many elements are present in this compound?

• One

• Two

• Three

Tags

NGSS.MS-PS1-1

Hydrogen nitrate is a compound.

How many elements are present in this compound?

• 1

• 2

• 3

• 4

• 5

Tags

NGSS.MS-PS1-1

Sodium oxide is a compound.

What elements are present in this compound?

• sodium and oxide

• sodium and oxygen

Tags

NGSS.MS-PS1-1

Silicon dioxide is a compound.

What elements are present in this compound?

• silicon and dioxide

• silicon and oxide

• silicon and oxygen

Tags

NGSS.MS-PS1-1

Sodium chloride is a compound.

What elements are present in this compound?

• sodium and chloride

• sodium and chlorine

Tags

NGSS.MS-PS1-1

Ammonia is a compound. What elements are present in this compound?

• nitrogen and hydrogen

• niobium and hydrogen

• nickel and hydrogen

• nobelium and hydrogen

Tags

NGSS.MS-PS1-1

Calcium carbonate is a compound. What elements are present in this compound?

• calcium and carbonate

• calcium and carbon

• calcium, carbon and oxygen

Tags

NGSS.MS-PS1-1

Sodium hydrogencarbonate is a compound. What elements are present in this compound?

• sodium and hydrogencarbonate

• sodium, hydrogen and carbonate

• sodium, hydrogen and carbon

• sodium, hydrogen, carbon and oxygen

Tags

NGSS.MS-PS1-1

Copper(II) sulfate is a compound. What elements are present in this compound?

• copper(II) and sulfate

• copper and sulfate

• copper and sulfur

• copper, sulfur and oxygen

Tags

NGSS.MS-PS1-1