Chemistry (Single Science) - Cambridge OCR Gateway

This interactive quiz is for GCSE Chemistry (single science) students studying pure substances and mixtures. Test your knowledge of filtration, crystallisation and distillation.

This interactive quiz is for GCSE Chemistry (single science) students studying atomic structure. Test your knowledge of atomic models, atomic number and calculating atomic mass.

This interactive quiz is for GCSE Chemistry (single science) students studying the periodic table. Test you knowledge of elements and Mendeleev’s early periodic table.

This interactive quiz is for GCSE Chemistry (single science) students studying acids, alkalis and salts. Test your knowledge on neutralisation, reactions with acids and solutions.

This interactive quiz is for GCSE Chemistry (single science) students studying acids, alkalis and salts. Test your knowledge of indicators, reactions and chemical equations.

This interactive quiz is for GCSE Chemistry (single science) students studying nanoscience. Answer questions about nanoparticles and the properties of Nanoparticulate materials.

Learn about atomic structure and the periodic table for your GCSE chemistry exam, with Dr Sunayana Bhargava and Tulela Pea.

Learn about bonding, structure and properties of matter for your GCSE chemistry exam, with Dr Sunayana Bhargava and Tulela Pea.

Dr Sunayana Bhargava and Tulela Pea take you through what you need to know about chemical changes for your GCSE chemistry exam.

Learn all about science exam techniques for your GCSE science exams with Dr Alex Lathbridge.

Kinetic theory models the arrangement and movement of particles in solids, liquids and gases. It explains properties of substances in these different states, and what happens during changes of state.

Want to know what happens when materials melt, evaporate and boil? Find out with this interactive activity designed for the GCSE OCR Gateway chemistry specification.

Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells. The numbers of particles in an atom can be calculated from its atomic number and mass number.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

There are different ways to separate mixtures, for example by filtration, crystallisation, distillation, or chromatography. The method chosen depends upon the type of mixture.

Mendeleev made an early periodic table. In the modern table, elements are put in order of atomic number into periods and groups. Electron arrangements model how electrons are arranged in atoms.

Ionic bonds, covalent bonds and metallic bonds are examples of chemical bonds. The structure and bonding in a substance are modelled in different ways, including dot and cross diagrams.

Carbon atoms can form four covalent bonds. This is why they can form many different organic substances, such as diamond, graphite and fullerenes. Different substances have different bulk properties.

Nanoparticles are 1 nm to 100 nm in size. They have very large surface area to volume ratios. The properties of nanoparticulate substances are different from those of the same substance in bulk.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Chemists use symbols and formulae to represent elements, ions and compounds. Chemical equations model the changes that happen in chemical reactions.

What is the mole and Avogadro's constant? The mole is the unit for amount of substance. The number of particles in a substance can be found using the Avogadro constant. The mass of product depends upon the mass of limiting reactant.

Exothermic reactions in solution give out energy and the temperature increases, while endothermic reactions take in energy and the temperature decreases. Bonds are broken and made in reactions.

Oxidation is the gain of oxygen and reduction is the loss of oxygen. Neutralisation is the reaction between an acid and a base. Acids react with metals, bases and carbonates to produce salts.

Electrolysis involves using electricity to break down electrolytes to form elements. The products of electrolysis can be predicted for a given electrolyte. Copper can be purified using electrolysis.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Group 1 contains reactive metals, group 7 contains reactive non-metals and group 0 contains unreactive non-metals. Reactivity increases down group 1 but up group 7. Many metals are transition metals.

Laboratory tests are used to detect and identify gases and ions. Instrumental methods of analysis are faster, more accurate and more sensitive than these simple chemical tests.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

The percentage yield shows how much product is obtained compared to the maximum possible mass. The atom economy of a reaction gives the percentage of atoms in reactants that form a desired product.

Calculations involving the mole can be used to determine unknown concentrations, volumes and masses in reactions. One mole of any gas occupies 24 dm3 at room temperature and pressure.

The greater the frequency of successful collisions between reactant particles, the greater the reaction rate. Temperature, concentration, pressure and the use of catalysts affect reaction rate.

Chemical reactions are reversible and may reach a dynamic equilibrium. The direction of some reversible reactions is altered by changing the reaction conditions.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Most metals are extracted from ores. Iron and aluminium are extracted in different ways because they differ in reactivity. Life-cycle assessments analyse the environmental impact of products.

Fertilisers contain elements needed for plant growth. They are made in different ways in the lab and in industry. Reaction conditions are chosen to get an acceptable yield in an acceptable time.

Rusting can be prevented by keeping oxygen and water away, and by sacrificial protection. An alloy is a mixture of elements, including at least one metal. Different alloys have different properties.

Materials include glass and clay ceramics, polymers, metals and composite materials. They have different physical properties, which make them suitable for different uses.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Crude oil is a finite resource. Petrol and other fuels are produced from it by fractional distillation. These fuels are non-renewable resources. Cracking helps match supply of fractions with demand.

The alkanes, alkenes, alcohols and carboxylic acids are four different homologous series of organic compounds. Their different chemical properties are due to their characteristic functional groups.

Addition polymers are made from molecules containing C=C bonds. Polymers have different uses that depend on their properties. DNA, starch and proteins are biological polymers.

A chemical cell produces a voltage until one of the reactants is used up. In a hydrogen-oxygen fuel cell, hydrogen and oxygen are used to produce a voltage, and water is the only product.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Earth’s early atmosphere probably had less oxygen than now, but more carbon dioxide and water. Increases in greenhouse gases are leading to climate change.

Understanding how to approach exam questions helps to boost exam performance. Question types will include multiple choice, structured, mathematical and practical questions.

Scientific investigations have several stages - planning, collecting data, analysing data and evaluation. It is important to understand how to carry out each stage of the investigation.

Get ready for the GCSE chemistry exams with these interactive resources from BBC Bitesize.