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 neutralisationThe 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
Quantitative Chemistry
The Rate and Extent of Chemical Change
Atomic Structure and the Periodic Table
Relative electrical charges of subatomic particles
- 2 things to know
- Chemistry Paper 1
Overview
The relative charges of the proton, electron and neutron, why an atom has no overall charge, equal numbers of protons and electrons, atomic number as the number of protons, identifying an element from it, and where each particle sits in the nuclear model.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Using the nuclear model, describe where the three types of particle are found in an atom.
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is the relative electrical charge of a proton?
Model answer
It is +1.
- 2
What is the relative electrical charge of an electron?
Model answer
It is −1.
- 3
What is the relative electrical charge of a neutron?
Model answer
It is 0, because a neutron has no charge.
- 4
Which particles in an atom carry an electrical charge?
Model answer
Protons, which are positive, and electrons, which are negative.
- 5
In an atom, how does the number of electrons compare with the number of protons?
Model answer
They are equal.
- 6
Explain why an atom has no overall electrical charge.
Model answer
It has equal numbers of protons and electrons, and their opposite charges cancel out.
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