Key term
AQA GCSE Chemistry 8462
Atomic Structure and the Periodic Table
Topic overviewAtoms, elements and compoundsWord equations, symbols and balanced equationsMixturesFrom the plum pudding model to the nuclear modelBohr, Chadwick and the modern model of the atomRelative electrical charges of subatomic particlesSize and mass of atomsRelative atomic mass and electronic structureThe periodic tableDevelopment of the periodic tableMetals and non-metalsGroup 0Group 1Group 7Transition metals, and how they differ from Group 1
Bonding, Structure, and the Properties of Matter
Topic overviewChemical bonds, including metallic bondingIonic bondingIonic compoundsCovalent bonding and how it is representedThe three states of matter and changes of statePredicting state, state symbols, and the limits of the particle modelProperties of ionic compoundsProperties of small moleculesPolymers and giant covalent structuresProperties of metals and alloys, and why metals conductDiamond and graphiteGraphene and fullerenesSizes of particles and their propertiesUses of nanoparticles
Chemical Analysis
Chemical Changes
Topic overviewThe reactivity seriesMetal oxides, extraction, and redox in terms of electronsAcids reacting with metals, neutralisation and saltsSoluble saltsThe pH scale and neutralisationTitrationsThe process of electrolysis, and molten ionic compoundsUsing electrolysis to extract metalsElectrolysis of aqueous solutions
Chemistry of the Atmosphere
Topic overviewThe Earth's early atmosphereHow oxygen increased and carbon dioxide decreasedThe gases in today's atmosphere, and which are greenhouse gasesHuman activities which contribute to an increase in greenhouse gases in the atmosphereGlobal climate change and carbon footprintsAtmospheric pollutants from fuels, and their effects
Energy Changes
Organic Chemistry
Topic overviewCrude oil, hydrocarbons and alkanesFractional distillation and petrochemicalsProperties of hydrocarbonsCracking, and testing alkenes with bromine waterWhy cracking is useful, and equations for itStructure and formulae of alkenesReactions of alkenesAlcoholsCarboxylic acidsAddition polymerisationAmino acids, DNA and naturally occurring polymers
Quantitative Chemistry
The Rate and Extent of Chemical Change
Using Resources
Topic overviewUsing the Earth's resources and sustainable developmentProducing potable water in the UKDesalination, and analysing water samplesWaste water treatmentLife cycle assessmentWays of reducing the use of resourcesCorrosion and its preventionAlloys as useful materialsGlass, clay ceramics and polymersComposites, and comparing materialsThe Haber processProduction and uses of NPK fertilisers
Using Resources
Alloys as useful materials
- 3 things to know
- Paper 2
Overview
Why most everyday metals are alloys, bronze and brass and their uses, gold alloys and carat values, high and low carbon steels, stainless steel and aluminium alloys, and matching the properties of each alloy to uses such as car panels, aircraft bodies, cutlery and silver jewellery.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Which two metals are mixed to make brass?
Key term
Give a use of bronze.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Explain why most metals in everyday use are alloys rather than pure metals.
Model answer
The different sized atoms distort the layers so they cannot slide over each other easily, making the alloy harder than the pure metal.
- 2
Which two metals are mixed to make bronze?
Model answer
Copper and tin.
- 3
Which two metals are mixed to make brass?
Model answer
Copper and zinc.
- 4
Give a use of bronze.
Model answer
Bronze is used for statues and medals.
- 5
Give a use of brass.
Model answer
Brass is used for musical instruments and door fittings.
- 6
Which metals is gold usually mixed with when it is used for jewellery?
Model answer
Silver, copper and zinc.
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