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>>Structure of Atom
>>Filling of Orbitals in Atom
>> $The valence electrons of magnesium is di$

Question

The valence electrons of magnesium is different in ........... quantum number.

A

$m$

B

$n$

C

$l$

D

$s$

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Updated on : 2022-09-05

Solution

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Correct option is D)

The configuration of magnesium is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2}$ .
The outermost electron is in s orbital and is paired.
Therefore, for the two electrons in 3s orbital, only s, spin quantum number is different.

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