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In the ground state, an element has 13 e...

In the ground state, an element has 13 electrons in its "M shell". The element is

A

copper

B

chromium

C

nickel

D

iron

Text Solution

Verified by Experts

The correct Answer is:
B
Number of electrons in M-shell (i.e `3^(rd)` shell)= 13 Thus electronic configuration of M- shell : `3s^(2)3p^(6) 3d^(5)`
Either Mn of Cr involves `3d^5` configuration.
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