OCR GCSE Combined Science A (Gateway): Chemistry
Exam Questions

The Particle Model, Limitations of the Particle Model

Atomic Models Through Time, Atomic Structure, Calculating the Particles

Pure & Impure, Relative Masses, Empirical Formula, Alloys, Separation Techniques, Chromatography

Metals & Non-Metals, Electronic Structure, Ionic Bonding, Covalent Bonding, Giant Covalent Structures, Polymers, Metals, Atomic Structure & the Periodic Table

Carbon, Changes of State, Bulk Properties

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, Neutralisation, Effect of Hydrogen Ion Concentration on pH

Electrolysis, Electrolysis of Aqueous Solutions, Reactions at Electrodes, Half Equations

Group 1, Group 7, Group 0, The Reactivity Series, Predicting Reactivity

Testing for Common Gases

Measuring Rates, Rate Graphs, Change Rates, Catalysts & Enzymes

Equilibrium, Le Chatelier's Principle

Extracting Metals, Biological Extraction Methods, Life Cycle Assessment, Recycling Materials

Crude Oil & Fractional Distillation, Cracking

Origins of the Atmosphere, The Greenhouse Effect, Climate Change, Atmospheric Pollutants, Potable Water

Electrolysis, Separation Techniques, Distillation, Production of Salts, Measuring Rates of Reaction