Question

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

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

Answer 1

The correct option is B ground state

The electron configuration of an atom shows the number of electrons in each sublevel in each energy level of the ground state atom.
Here, $1s^{2}2s^{2}2p^{6}3s^{2}3p^{2}3d^{5}4s^1$ is ground state electronic configuration of Cr.
Note: To write the electronic configuration a more convenient way is shown in figure below.