Question

An element has 13 electrons in its M shell and 1 electron in N shell in ground state. Identify the element.

• A. Chromium
• B. Iron
• C. Manganese
• D. Copper

Answer 1

Answer: (A)

Chromium

Answer 2

: $\underset{K}{\overset{1s^{2},}{︸}}\underset{L}{\overset{2s^{2}2p^{6},}{︸}}\underset{M}{\overset{3s^{2}3p^{6}3d^{5},}{︸}}\underset{N}{\overset{4s^{2},}{︸}}$

M orbital with 13 electrons and N orbital with 1 electron corresposnd to chromium.