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Q.
An atom has $2$ electrons in $K$ shell, $8$ electrons in $L$ shell and $6$ electrons in $M$ shell. The number of electrons having $l=0$ is______.
Structure of Atom
Solution:
The electronic configuration of the atom is:
$1 s^{2}\, 2 s^{2}\, 2 p^{6} \,3 s^{2} \,3 p^{4}$.
For $s$ orbital, $l=0$.
Therefore, number of electrons having $l=0$ is $6$ .