Question

Cr has electronic configuration as

• A. $3s^{2}3p^{6}3d^{4}4s^1$
• B. $3s^{2}3p^{6}3d^{5}4s^1$
• C. $3s^{2}3p^{6}3d^6$
• D. None of these

Answer 1

Answer: (B)

Cr(Z = 24) : $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}3d^5$.