Valency, formulae and equations

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• 11 sections of explanation, worked examples and diagrams
• 2 practice tasks with hints and worked answers
• A quiz that marks itself as you go
• Your progress kept across every subject you take

Other lessons in this sub-strand

1. The periodic table and why atoms form ions
2. Valency, formulae and equations
3. Electron arrangements of the first twenty elements
4. Metals, non-metals and the step
5. Groups I and II: metals that lose electrons
6. Groups VII and VIII: gainers and the unreactive
7. Stability and electron affinity
8. Ion formation for the first twenty elements
9. Oxidation numbers
10. Radicals and more chemical formulae
11. From word equations to symbol equations
12. Balancing equations and the table as a tool