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Question
Give the electronic configuration of Mn2+ and Cr3+
Solution
1. Mn (Z = 25)
\[\ce{Mn -> Mn^2+ + 2e^-}\]
Mn2+ electronic configuration is 1s 1s2 2s2 2p6 3s2 3p6 3d5
2. Cr (Z = 24)
\[\ce{Cr -> Cr^3+ + 3e^-}\]
Cr3+ electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d3
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