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.
Why does Argon have 18 electrons watch
- 18-10-2017 23:11
Last edited by jonzza_81; 22-10-2017 at 19:03.
- 18-10-2017 23:47