An atom of an element has two electrons in the M shell. Identify … - Vidyadip

MCQ

An atom of an element has two electrons in the $M$ shell. Identify its atomic number.

A
$10$
✓
$12$
C
$14$
D
$15$

✓

Answer

Correct option: B.

$12$

For $M$ shell value of $\ce{n = 3}$.
Thus the electronic configuration is : $2, 8, 2$ and atomic number is $12.$

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