Valence electrons

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Archana Biju 1G
Posts: 29
Joined: Fri Sep 28, 2018 12:18 am

Valence electrons

Postby Archana Biju 1G » Wed Oct 31, 2018 6:48 pm

Could someone explain how Manganese (Mn) has 7 valence electrons?

Anushi Patel 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:19 am
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Re: Valence electrons

Postby Anushi Patel 1J » Wed Oct 31, 2018 7:48 pm

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.

Catherine Kim 3K
Posts: 31
Joined: Fri Sep 28, 2018 12:26 am

Re: Valence electrons

Postby Catherine Kim 3K » Thu Nov 01, 2018 3:00 pm

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.

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