In terms of GCSE, outer shell has 2 steps of being full. So it's full at 8 but for potassium and calcium, you have 1 and 2 extra electrons in that shell respectively. Basically it's actually an extremely simplified and inaccurate model that is good at explaining bonding between small atoms.
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Why does Argon have 18 electrons watch
- 18-10-2017 22:11
Last edited by jonzza_81; 22-10-2017 at 18:03.
- 18-10-2017 22:47