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
Word equations, symbols and balanced equations
- 3 things to know
- Chemistry Paper 1
Overview
Writing reactions as word equations and symbol equations, reactants and products either side of the arrow, looking up element symbols in the periodic table, naming compounds from formulae such as NaCl, and why and how symbol equations are balanced.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Write the word equation for magnesium burning in oxygen.
Key term
Which element has the symbol K?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What are the two ways a chemical reaction can be written as an equation?
Model answer
It can be written as a word equation or as an equation using symbols and formulae.
- 2
In an equation for a reaction, what is written on each side of the arrow?
Model answer
The reactants are written on the left and the products on the right.
- 3
Write the word equation for magnesium burning in oxygen.
Model answer
Magnesium + oxygen → magnesium oxide.
- 4
Where can you look up the symbol of an element you cannot remember?
Model answer
In the periodic table, which lists every element with its symbol.
- 5
Which element has the symbol K?
Model answer
K is potassium.
- 6
Name the compound with the formula NaCl.
Model answer
It is sodium chloride.
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