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Valence electrons

Posted: Wed Oct 31, 2018 6:48 pm
by Archana Biju 1G
Could someone explain how Manganese (Mn) has 7 valence electrons?

Re: Valence electrons

Posted: Wed Oct 31, 2018 7:48 pm
by Anushi Patel 1J
In the outermost shell, n=4, manganese has 7 valence electrons because it has 2 electrons in the s subshell, and 5 in the d subshell. Usually when we talk about bonding and the octet rule, we look at only the s and p orbitals, but since manganese is a transition metal, we also look at the d subshell.

Re: Valence electrons

Posted: Thu Nov 01, 2018 3:00 pm
by Catherine Kim 3K
The electron configuration of Mn is [Ar]4s2 3d5. Therefore, it has 7 valence electrons. Also Mn is a transition metal so it would have incomplete d subshells.