Chemistry path · GCSE Chemistry

Is the electron total enough to fill the shells?

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Practice question

An atom of one of the first twenty elements contains 18 electrons. Work out its electronic structure and explain how the shells are filled.

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Official curriculum

4.1.1.7 Electron shell filling

This challenge practises knowledge and exam skills from the official GCSE science curriculum. Use these sources to see the exact subject content and its wider Key Stage 4 context.

AQA specification 4.1.1.7 Electron shell filling GOV.UK Key Stage 4 science programme

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