GCSEScienceOCRCombined Science A (Gateway)ChemistryRevision Notes

OCR GCSE Combined Science A (Gateway): Chemistry Revision Notes

Concise resources for the OCR GCSE Combined Science A (Gateway): Chemistry course.

Particles

The Particle Model

Limitations of the Particle Model

Atomic Models Through Time

Atomic Structure

Calculating the Particles

Elements, compounds & mixtures

Relative Masses

Empirical Formula

Separation Techniques

Metals & Non-Metals

Electronic Structure

Covalent Bonding

Giant Covalent Structures

Atomic Structure & the Periodic Table

Changes of State

Bulk Properties

Chemical Reactions

Chemical Symbols & Formulae

Deducing Formulae Using Common Ions

Balancing Chemical Equations

Writing Balanced Ionic Equations

The Avogadro Constant

Conservation of Mass

Using Moles to Balance Equations

Calculating Masses from Balanced Equations

Exothermic & Endothermic Reactions

Calculating Energy Changes

Oxidation & Reduction

Oxidation & Reduction in Terms of Electrons

Acids & Alkalis

Effect of Hydrogen Ion Concentration on pH

Electrolysis of Aqueous Solutions

Reactions at Electrodes

Predicting & Identifying Reactions & Products

The Reactivity Series

Predicting Reactivity

Testing for Common Gases

Monitoring & Controlling Chemical Reactions

Measuring Rates

Catalysts & Enzymes

Le Chatelier's Principle

Global Challenges

Extracting Metals

Biological Extraction Methods

Life Cycle Assessment

Recycling Materials

Crude Oil & Fractional Distillation

Origins of the Atmosphere

The Greenhouse Effect

Atmospheric Pollutants

Practical Skills

Separation Techniques

Production of Salts

Measuring Rates of Reaction

Exam boards

Study tools

Related links