An element has 2 electrons in its K-shell. 8 electrons in L-shell, 13 electrons in M-shell and one electron in N-shell. The element is

The energy levels are present as K=1,L=2,M=3,N=4.

So, in K shell, 2 electrons 1s² are present

In L shell, 8 electrons 2s²2p⁶ are present

In M shell, 13 electrons 3s²3p⁶3d⁵ are present

In N shell, 1 electron 4s¹ is  present.

The total number of electrons is 24. Therefore, the atomic number is 24 and the element is Cr.

Electronic configuration of chromium is: 1s²2s²2p⁶3s²3p⁶4s¹3d⁵