Chemistry Key Definitions (OCR)

Atomic Number

Mass Number

Relative Isotopic Mass

Relative Atomic Mass

Isotopes

Mole

Avogadro's Constant

Molar Mass

Empirical Formula

Molecular Formula

Water of Crystallisation

Acid

Base

Alkali

Salt

Anhydrous

Hydrated

Oxidation Number

Oxidation

Oxidising Agent

Reduction

Reducing Agent

Redox

Displacement Reaction

Disproportionation

Atomic Orbital

S/P/D Block Element

Ionic Bond

Covalent Bond

Dative (Co-Ordinate) Bond

Electronegativity

Metallic Bonding

Periodicity

Hydrogen Bond

First Ionisation Energy

Successive Ionisation Energy