Question

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

Answer 1

Ground state of manganese contain 23 (Mn2+) so

K.....2 electrons

L......8 electrons

M......13 elctrons

2+8+13=23 electrons..

Answer 2

The elements which has 13 electrons in their M shell in the ground state is manganese and chromium.

Explanation:

According to the Bohr's model of an atom, an electrons revolve around the positively charged nucleus in orbits called shells or energy levels.

The energy levels are represents by the letters K, L, M, and N.

The given element has 13 electrons in their M shell.

Chromium:

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

Number of electrons in third shell = $3 s^{2} 3 p^{6} 3 d^{5} = 2 + 6 + 5 = 13$

Total electrons = 24 = atomic number

The atomic number 24 element is Chromium.

Manganese:

Manganese also has 13 electron in their M shell.

The electronic configuration of Mn is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{5}$

The atomic number of manganese is 25.