Atoms & Molecules

A substance made up of atoms with the same number of protons, joined together by chemical bonds.

A substance made up of atoms of two or more different elements joined together by chemical bonds.

The smallest particle in a compound that has the chemical properties of that compound.

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The smallest unit of an element, consisting of protons, neutrons, and electrons.

The central part of an atom, containing protons and neutrons.

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

Positively charged particles found in the nucleus of an atom.

Neutral particles found in the nucleus of an atom, with no charge.