This video describes how to write the electron configuration of ions.
0:27 main group elements
0:44 nitride
1:32 sulfide
2:15 fluoride
3:18 lithium ion
3:56 calcium ion
4:50 aluminium ion
4:53 transition metal elements
6:23 chromium(III) ion
7:48 post-transition metals
8:31 gallium (III) ion
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