Chemical Substances, Reactions & Essential Resources

The Nature of Substances & Chemical Reactions

Elements & Compounds

Chemical Symbols & Formulae

Relative Atomic Mass & Relative Molecular Mass

Percentage Composition

Separating Mixtures

Conservation of Mass

Evidence of a Chemical Reaction

Chemical Equations

Percentage Yield

Reacting Masses

The Avogadro Constant & the Mole

Atomic Structure & The Periodic Table

Atomic Structure

Atomic Number, Mass Number & Isotopes

The Periodic Table

Electronic Structure

Trends in the Periodic Table

Reactions of Alkali Metals

Testing for Hydrogen Gas

Reactions of Halogens

Group 0 Gases

Testing Cations & Anions

Water

Composition of Water

Sustainable Water Supply

Water Treatment

Fluoridation of Water

Desalination

Distillation

Solubility Curves

Hard Water

Water Softening

Benefits & Drawbacks of Hard Water

Determining Hardness in Water

The Ever-Changing Earth

Structure of the Earth

Plate Tectonics

Plate Boundaries

The Atmosphere

Carbon Dioxide & Sulfur Dioxide Emissions

Global Warming & Acid Rain

Testing for Oxygen & Carbon Dioxide

Rate Of Chemical Change

Determining the Rate of Reaction

Factors Affecting Rates

Hydrochloric Acid & Sodium Thiosulfate

Particle Theory

Catalysts

Rate of Reaction Using Gas Collection

Chemical Bonding, Application Of Chemical Reactions & Organic Chemistry

Bonding, Structure & Properties

Properties of Substances

Metallic Bonding

Ionic Bonding

Giant Ionic Structures

Covalent Bonding

Intermolecular Bonding

Diamond & Graphite

Fullerenes

Carbon Nano-tubes & Graphene

Bulk Properties

Nano-scale Particles

Smart Materials

Acids, Bases & Salts

The pH Scale

Hydrogen & Hydroxide Ions

Acids Reacting with Metals

Neutralisation of Acids

The Acid-Carbonate Reaction

Making Soluble Salts

Preparing Crystals of a Soluble Salt

Naming Salts

Testing for Sulfate Ions

Titrations

Acid-Base Titration

Metals & Their Extraction

Metal Ores

Native Metals

Metal Reactivity

Metal Displacement Reactions

Oxidation & Reduction

Extraction of Iron

Electrolysis of Molten Ionic Compounds

Oxidation & Reduction Using Electrons

Extraction of Aluminium

Properties of Metals

Transition Metals

Alloys

Factors Affecting Extraction Processes

Chemical Reactions & Energy

Exothermic & Endothermic Reactions

Energy Profiles

Bond Energy Calculations

Crude Oil, Fuels & Organic Chemistry

Crude Oil

Fractions in Crude Oil

Impact of the Oil Industry

Combustion of Hydrocarbons

Energy Density of a Fuel

Energy from Fuels

Hydrogen as a Fuel

The Fire Triangle

Cracking Hydrocarbons

Naming Alkanes & Alkenes

Isomerism in Hydrocarbons

Addition Polymerisation

Alkenes

Plastics

Exam boards

• WJEC GCSE Science (Double Award): Biology
• WJEC GCSE Science (Double Award): Physics
• Edexcel GCSE Combined Science: Biology
• Edexcel GCSE Combined Science: Chemistry
• Edexcel GCSE Combined Science: Physics

Study tools

• WJEC GCSE Science (Double Award) · Past Papers

Related links

• GCSE Science · Revision Notes
• GCSE Science · Exam Questions
• GCSE Science · Past Papers