chemistry terms

What is Chemistry?

Chemistry is the scientific study of the properties and behavior of matter.

What is an atom?

An atom is the smallest unit of ordinary matter that forms a chemical element. It consists of a nucleus (protons and neutrons) and orbiting electrons.

What is a molecule?

A molecule is a group of two or more atoms held together by chemical bonds, forming the smallest identifiable unit into which a pure substance can be divided and retain the composition and chemical properties of that substance.

What is a chemical element?

A chemical element is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.

What is a chemical bond?

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.