Question

Which of the following d- block element has half filled penultimate as well as valence subshell?

• A. Cu
• B. Au
• C. Ag
• D. Cr

Answer 1

Answer: (D)

Cr

Answer 2

$24Cr \rightarrow 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\underset{half - filled}{\overset{4s^{1}3d^{5}}{︸}}$