Elements, Compounds and Mixtures

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together. It has a fixed composition and distinct properties.

Front

What is a mixture?

Back

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

Front

Give an example of an element.

Back

Gold (Au) 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, as it contains various gases like nitrogen, oxygen, and carbon dioxide.

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed ratio of elements and is chemically bonded, while a mixture has no fixed composition and the components are physically combined.

Front

What is the chemical symbol for chlorine?

Back

The chemical symbol for chlorine is Cl.

Front

What does it mean for a substance to be chemically bonded?

Back

Chemically bonded means that atoms are held together by chemical forces, forming a new substance with different properties.

Front

Can mixtures be separated? If so, how?

Back

Yes, mixtures can be separated by physical methods such as filtration, distillation, or evaporation.