Define amount of substance

Define the Avogadro constant

Define mole

Define molar mass

Define empirical formula

Define molecule

Define molecular formula

Define molar volume

Define concentration

Define standard solution

Define species

Define stoichiometry

Define acid

Define base

Define alkalis

Define salt

Define cation

Define anion

Define hydrated

Define anhydrous

Define water of crystallisation

Define oxidation number

Define oxidation

Define reduction

Define redox reaction

Define reducing agent

Define oxidising agent

Define isotopes

Define atomic (proton) number

Define mass (nucleon) number

Define ion

Define isotopic mass

Define relative atomic mass

Define relative molecular mass

Define relative formula mass