Normal Ca atom electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2
Ca+ (last electron is gone from the s orbital): 1s2 2s2 2p6 3s2 3p6 4s1
The Fe2 plus electron configuration is 1s2 2s2 2p6 3s2 3p6 3d6.
The electron configuration of Cu2+ is [Ar]3d94s0.
Li, Be, O: the first term in the abridged electron configuration is [He]. Ca, K: the first term in the abridged electron configuration is [Ar].
Cobalt electron configuration is [Ar]3d7.4s2.Cobalt(2+) electron configuration is [Ar]3d7.
Cobalt(II) electron configuration is [Ar]3d7.
The electron configuration for a magnesium cation Mg2 plus is 1s2.2s2.2p6.
1s2 2s2 2p63s23p64s2
Calcium loses two electrons to obtain a noble-gas electron configuration.
No Such ... all atoms have an electron configuration, yet Ca++ is not a noble gas.
[Kr]4d105s25p6
Ca {1s2 2s2 2p6 3s2 3p6 4s2 }
It can't sowwy