Avogadro's Number

Mole: A unit in chemistry representing Avogadro's number worth of particles (atoms, molecules, ions etc.)

Atoms/Molecules/Ions: These are basic units that make up matter; atoms form molecules and ions are charged atoms or groups of atoms.

Stoichiometry: The part of chemistry dealing with quantitative relationships between reactants and products in chemical reactions; often involves calculations using moles and Avogadro’s number.