1s2 2s2 2p6 3s2 3p6 4s2 3d3A+
1s2 2s2 2p6 3s2 3p6 4s2 3d3
Iron
Ca
Fe3+ = = 1s2, 2s2, 2p6, 3s2 , 3p6 , 3d5 (S2- = = 1s2, 2s2, 2p6, 3s2, 3p2) As the S2- ion has gained to electrons not lost them, it now has 18 electrons not 14, Thus: S2- = 1s2, 2s2, 3p6, 3s2, 3p6
electron configuration of galliumis: [Ar]3d104s24p1
[Ar] 3d3 4s2 Or, expanded: 1s2 2s2 2p6 3s2 3p6 3d3 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d3A+
[Ar] 4s2 3d3
The electronic configuration of Fe3+ is [Ar] 3d3 4s2 or 2, 8, 11, 2
1s2 2s2 2p6 3s2 3p6 4s2 3d3 For abbreviation: [Ca] 3d3
Vanadium.
[Ar] 4s2
1s2 2s2 2p6 3s2 3p6 4s2 3d3
Iron
The element is titanium and is in 4th period, group 4.
[Ar] 4s2 3d10 4p5