The number of electrons in the M-shell of the element with atomic number 24 is

The number of electrons in the M-shell of the element with atomic number 24 is 13.
The electronic configuration for atomic number 24 is written as

1 s^{2}, 2 s^{2}, 2 p^{6}, 3 s^{2}, 3 p^{6}, 3 d^{5}, 4 s^{1}

M shell is the third shell i,e. n=3.
The number of electrons in the third shell is

2 + 6 + 5 = 13

Therefore, the number of electrons present in the third shell is 13.

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