Question

Which of the following general configuration of outermost shell represents chromium element

[Cr’s atomic number = 24]

• A. $d^{5}s^{1}$
• B. $d^{6}s^{0}$
• C. $d^{4}s^{2}$
• D. $d^{3}s^{2}$

Answer 1

Answer: (A)

$d^{5}s^{1}$

Answer 2

\begin{tabular} { | l | l | l | l | l | l | } \ $d ^ { 5 } s ^ { 1 }$ & 1 & 1 & 1 & 1 & 1 \ \hline \end{tabular}

This configuration is more stable because of symmetrical distribution of e^– and exchange energy.