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
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.
Calcium (Ca) has 20 electrons and its electron configuration is [Ar] 4s². To attain a noble gas electron configuration, calcium needs to lose two electrons to achieve the stable electron configuration of argon ([Ar] 4s² 3d¹⁰).
The electron configuration for neutral Barium is [Xe] 6s2. Barium plus 2 means it has lost 2 electrons, so the electron configuration for Barium plus 2 would be [Xe].
There are four electrons in a Beryllium atom. Hence the mono positive ion has only three electrons. Therefore the electron configuration is 1s2 2s1.
The electron configuration for a magnesium cation Mg2 plus is 1s2.2s2.2p6.
Calcium loses two electrons to obtain a noble-gas electron configuration.
The Fe2 plus electron configuration is 1s2 2s2 2p6 3s2 3p6 3d6.
The element with this electron configuration is calcium (Ca), which has 20 electrons.
1s2 2s2 2p63s23p64s2
The electron configuration of Cu+1 is [Ar] 3d10 4s1. When copper loses one electron to become a +1 ion, it loses the 4s electron first, followed by one of the 3d electrons to attain a stable electron configuration.
Ca {1s2 2s2 2p6 3s2 3p6 4s2 }