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Electron Distribution in Different Orbits

The atomic nu...

Question

The atomic number of an element is $11$ . Therefore the number of electrons in the M-shell of its atom is:

A

2

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B

8

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C

1

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D

0

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Solution

The correct option is D $1$
$M$ shell of an atom means 3rd shell (K, L, M).

The electronic configuration of an atom having atomic number $11$ is $2, 8, 1$ which shows that the third shell contains $1$ electron.

Hence, option C is correct.

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