Question

The number of electrons in the M-shell of the element with atomic number 24 is :-
A. 24. B. 12. C. 8. D.13

Answer 1

Electronic configuration of Atomic number 24:

1s2

2s2

2p6

3s2

3p6

3d5

4s1

M-shell is third shell, i.e. n = 3
Number of electrons in third shell are 2+6+5 = 13

Answer is (d). 13