Platforms
B =
1
D =
6
n = 2, l = 0 subshell:
2
1s22s22p63s23p64s1:
K
E =
n = 2, l = 1 subshell:
1s22s22p63s23p64s23d8:
Ni
3d subshell:
10
1s22s22p63s23p64s23d104p65s24d3:
Nb
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Periodic Trends
Atomic Numbers and Electron Configurations