Atoms, Elements, Molecules, and Compounds

Front

What is an atom?

Back

The smallest unit of matter; the smallest particle of an element that can exist.

Front

What is an element?

Back

A pure substance made of only one type of atom.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

A substance in which the atoms of two or more elements are combined together.

Front

True or False: All compounds are molecules.

Back

True.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single particle, while a molecule is made up of two or more atoms bonded together.

Front

Can a molecule be made of the same type of atom?

Back

Yes, a molecule can consist of two or more atoms of the same element, like O2 (oxygen gas).

Front

What is a pure substance?

Back

A material made of only one type of particle, which can be an element or a compound.

Front

What is the smallest particle of an element?

Back

An atom.

Front

What do we call a substance made of two or more different elements?

Back

A compound.