OCR AS CHEMISTRY A DEFINITIONS

Isotope

Atomic Number

Mass Number

Ion

Relative Isotopic Mass

Relative Atomic Mass

Relative Molecular Mass

Amount of Substance

Avagadro's Constant

A Mole

Molar Mass

Empirical Formula

Molecule

Molecular Formula

Concentration

Standard Solution

Species

Stoichiometry

Acid

Base

Alkali

Salt

Cation

Anion

Hydrated

Anhydrous

Water of Crystalisation

Oxidation Number

Oxidation

Reduction

Reducing Agent

Oxidising Agent

First Ionisation Energy

Electron Shielding

Successive Ionisation Energies

Shell

Principal Quantum Number, n

Atomic Orbital

Sub-shell

Electron Configuration

Compound

Ionic Bond

Giant Ionic Lattice

Group