OCR Chemistry - Atoms, Bonds and Groups (Definitions)

Acid

Base

Alkali

Salt

Hydrated Crystals

Anhydrous Crystals

Water of Crystallisation

Oxidation

Reduction

Oxidation Numbers

Redox Reaction

Reducing Agent

Oxidising Agent

Mass Number

Atomic Number

Isotope

Relative Atomic Mass

Relative Isotopic Mass

First Ionisation Energy

Second Ionisation Energy

Ionic Bonding

Covalent Bond

Co-ordinate Bond (Dative covalent bone)

Metallic Bonding

Electronegativity

Hydrogen Bond

Thermal Decomposition

Displacement (Reaction)

Intermolecular Forces

Disproportionation

Periodicity