Review: Compounds, Mixtures and Reactions

Air is a compound.

• True
• False

Compounds are made up of two or more atoms physically combined.

• True
• False

The properties of the elements that make up a compound are usually very similar to the compound itself.

• True
• False

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Does this picture show a compound?

• No
• Yes

Which of the substances below is a compound?

• ink
• air
• oxygen
• salt

Can compounds be found in the periodic table?

• Yes
• No

Is water an element or a compound?

• Element
• Compound

A compound consists of two or more elements bound together.

• True
• False