Elements and Compounds

Na is the chemical symbol for:

• Sodium

• Tin

• Nebraska

C is the chemical symbol for:

• Calcium

• Carbon

• Chlorine

Helium, which is put in balloons, is less dense than air.

• True

• False

The chemical symbol for Mercury is HG.

• True

• False

An Element is a simple pure substance. It __________ be separated?

• cannot

• can

Frying pans are usually made from metals because they are good conductors of heat.

• True

• False

A _______________ is two or more elements that are chemically combined.

• Element

• Compound

• Mixture

A compound has different properties than the elements that react to form it.

• True

• False

A compound __________ be separated?

• cannot

• can

Are compounds chemically combined?

• Yes

• No