Elements, Compounds, and Mixtures

Front

What do atoms combine to form?

Back

Atoms combine to form compounds.

Front

What is an example of a compound?

Back

Water (H2O) is an example of a compound.

Front

Which of the following is not a compound: HCl, Cl, NaCl, CO2?

Back

Cl is not a compound; it is an element.

Front

What is the air classified as?

Back

Air is classified as a mixture.

Front

What is a carbon atom classified as?

Back

A carbon atom is classified as an element.

Front

Define an element.

Back

An element is a pure substance that cannot be broken down into simpler substances.

Front

Define a compound.

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

Define a mixture.

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What is the difference between a compound and a mixture?

Back

A compound has a fixed composition and properties, while a mixture retains the properties of its components.

Front

Give an example of a mixture.

Back

Air is an example of a mixture.