Atoms, Molecules, Elements, Compounds, and Mixtures

Front

What is an atom?

Back

An atom is the smallest unit of an element.

Front

Give an example of an atom.

Back

A single hydrogen atom (H).

Front

What is a molecule?

Back

A molecule is two or more atoms bonded together.

Front

Give an example of a molecule.

Back

A water molecule (H₂O), made of two hydrogen atoms and one oxygen atom.

Front

What is an element?

Back

An element is a substance made of only one type of atom.

Front

Give examples of elements.

Back

Oxygen (O) and carbon (C) are both elements.

Front

What is a compound?

Back

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

Front

Give an example of a compound.

Back

Sodium chloride (NaCl) is a compound made of sodium (Na) and chlorine (Cl).

Front

What is a mixture?

Back

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

Front

Give an example of a mixture.

Back

Air is a mixture of gases like nitrogen (N₂), oxygen (O₂), and carbon dioxide (CO₂).