Question #39125

1 Answer
Jun 9, 2017

Because M shell has the capacity for 88 electrons. Secondly, 1818
is used for all the sub shells in the M shell.

Explanation:

M shell has the capacity to store 88 electrons.
We have divided 1818 in three sub shells of the shell M ,e.g.,
3s = 23s=2
3p = 63p=6
3d = 103d=10
Now add them,
2+6+102+6+10 = 1818
Electronic configuration of CaCa =
1s^2, 2s^2,2p^6, 3s^2,3p^6, 4s^21s2,2s2,2p6,3s2,3p6,4s2, where;
K = 2K=2
L = 8L=8
M = 8M=8
N = 2N=2

You can take 1818 as a whole but, if you'll take the M shell it contains 8 electrons, if we'll also count its sub shell electro configuration then it will be greater than 8.