Elements, Compounds and Mixtures

Front

What is a mixture?

Back

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

Front

Can mixtures be separated?

Back

Yes, mixtures can be separated by physical means such as evaporation, filtration, and magnetic separation.

Front

What is an element?

Back

An element is a pure substance that cannot be separated into simpler substances by physical means.

Front

Is air a mixture or a compound?

Back

Air is a mixture of different gases.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

Is salt water a mixture?

Back

Yes, salt water is a mixture of salt and water.

Front

What is the chemical formula for sugar?

Back

The chemical formula for sugar is C12H22O11.

Front

Is CO2 a mixture?

Back

No, CO2 (carbon dioxide) is a compound.

Front

What does it mean for a substance to be pure?

Back

A pure substance contains only one type of particle and has a uniform composition.

Front

Can compounds be separated into simpler substances?

Back

Yes, compounds can be separated into their constituent elements through chemical reactions.