Stability and electron affinity
General Science · Grade 10 · about 40 minutes
A full outer shell is stable; electron affinity is how strongly an atom pulls an extra electron — high on the right, low on the left.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task 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
- The periodic table and why atoms form ions
- Valency, formulae and equations
- Electron arrangements of the first twenty elements
- Metals, non-metals and the step
- Groups I and II: metals that lose electrons
- Groups VII and VIII: gainers and the unreactive
- Stability and electron affinity
- Ion formation for the first twenty elements
- Oxidation numbers
- Radicals and more chemical formulae
- From word equations to symbol equations
- Balancing equations and the table as a tool