Key term
AQA GCSE Combined Science Chemistry 8464
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 7
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 fullerenes
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 neutralisationStrong and weak acidsThe process of electrolysis, and molten ionic compoundsUsing electrolysis to extract metalsElectrolysis of aqueous solutionsRepresentation of reactions at electrodes as half equations
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
Quantitative Chemistry
The Rate and Extent of Chemical Change
Topic overviewMeasuring the mean rate of a reactionRate from graphs, and the gradient of a tangentFactors which affect the rates of chemical reactionsCollision theory and activation energyCatalystsReversible reactions and dynamic equilibriumThe effect of changing conditions on equilibriumThe effect of changing concentrationThe effect of temperature changes on equilibriumThe effect of pressure changes on equilibrium
Atomic Structure and the Periodic Table
Group 0
- 3 things to know
- Chemistry Paper 1
Overview
The noble gases, why their full outer shells make them unreactive, how many outer electrons helium and the rest have, and how boiling point and density change going down the group.
What you need to know
Answer each one before you reveal it.
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Key term
How do the boiling points of the noble gases relate to relative atomic mass?
Key term
Explain, in terms of electrons, why argon does not react with oxygen.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What are the elements of Group 0 called?
Model answer
They are called the noble gases.
- 2
Why are the noble gases unreactive?
Model answer
Because their atoms already have a stable arrangement of electrons in the outer shell.
- 3
How many electrons are in the outer shell of a noble gas atom, apart from helium?
Model answer
Eight electrons.
- 4
How many electrons does a helium atom have in its outer shell?
Model answer
Only two, which is a full shell for helium.
- 5
Why do the noble gases not easily form molecules?
Model answer
Because their atoms have stable outer shells, so there is no tendency to share, lose or gain electrons.
- 6
What happens to the boiling points of the noble gases going down the group?
Model answer
They increase.
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