Elements, Compounds, Mixtures

Front

What is an element?

Back

An element is a pure substance that consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different types of atoms bond together chemically.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

Give an example of an element.

Back

Oxygen (O) is an example of an element.

Front

Give an example of a compound.

Back

Water (H2O) is an example of a compound.

Front

Give an example of a mixture.

Back

Air is an example of a mixture.

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed composition and properties, while a mixture can vary in composition and properties.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between a homogeneous mixture and a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has distinct, separate components.

Front

What is the smallest unit of an element?

Back

An atom is the smallest unit of an element.