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

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

A

Copper

B

Chromium

C

Nickel

D

Iron

Text Solution

Verified by Experts

The correct Answer is:
b
Electronic nconfiguration of chromium is,
chromium `(Cr_24)=1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(5)`
M shell represents the `3^(rd)` shell ie,`3s^(2),3p^(6),3d^(5)`
Therefore, chromium has 13 electrons in M shell.
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