Question

What is the electron configuration for manganese?

• A. $1s^{2}2s^{2}2p^{6}3s^{2}3p^5$
• B. $\left[Ar\right]4s^1$
• C. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^5$
• D. $1s^{2}2s^{2}2p^1$

Answer 1

The correct option is C $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^5$

The atomic number of Manganese (Mn) is $25$. Thus its electronic configuration is $\left[Ar\right]4s^{2}3d^5$ or

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}4d^5$. Thus answer is option C.