Question

The electronic configuration of an element is $1s^{2}2s^{2}2p^6,3s^{2}3p^{6}3d^5,4s^1$. This represents:

• A. excited state
• B. ground state
• C. cationic state
• D. anionic state

Answer 1

The correct option is B ground state

The electronic configuration of an element is $1s^{2}2s^{2}2p^6,3s^{2}3p^{6}3d^5,4s^1$. This represents ground state. It is electronic configuration of chromium (Z=24) which can also be represented as
$\left[Ne\right]3s^{2}3p^{6}3d^{5}4s^1$. In this electronic configuration, both 3d and 4s subshells are half filled. This corresponds to stability.