| H
1s |
He 1s2 |
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| Li 2s |
Be 2s2 |
B 2s2,2p |
C
2s2,2p2 C (new) |
N
2s2,2p3 N (new) |
O
2s2,2p4 O (new) |
F 2s2,2p5 |
Ne 2s2,2p6 |
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| Na
3s |
Mg
3s2 |
Al
3s2,3p |
Si
3s2,3p2 |
P
3s2,3p3 |
S 3s2,3p4 |
Cl
3s2,3p5 |
Ar 3s2,3p6 |
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| K 4s |
Ca
4s2 |
Sc 3d,4s2 |
Ti 3d2,4s2 |
V 3d3,4s2 |
Cr 3d4,4s2 |
Mn
3d5,4s2 |
Fe
3d6,4s2 |
Co 3d7,4s2 |
Ni 3d8,4s2 |
Cu
3d10,4s |
Zn 3d10,4s2 |
Ga
4s2,4p |
Ge
4s2,4p2 |
As 4s2,4p3 |
Se 4s2,4p4 |
Br 4s2,4p5 |
Kr 4s2,4p6 |
I (I2) I (I3-) 5s25p6 |
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| Pt 5d9, 6s Pt(semicore) 5d9, 6s |