Question

In ground state an element has 13 electrons in its M shell the element is?

Answer 1

Aluminium
Hope this can help you

Answer 2

Explanation:

The K shell is the first shell which contains sub-shells 1s and 2s. The L shell is the second shell which contains sub-shells 2s and 2p. The M shell is the third shell which contains sub-shells 3s, 3p and 3d.

As it is given that there are 13 electrons in the M shell. Therefore, the electronic configuration will be as follows.

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

Hence, there are total 25 electrons in the sub shells. Thus, we can conclude the atom with atomic number 25 is manganese.

Hence, in ground state an element has 13 electrons in its M shell, the element is manganese.