What is the electron configuration of an $\mathrm{Mn}$ atom in the ground state?

Manganese:

• Manganese is a d-block element having an atomic number $25$ and atomic symbol $\mathrm{Mn}$.
• It belongs to Group-7 and the fourth period.
• It is a hard silvery transition metal.

Electronic configuration: The arrangement of electrons into the orbitals of an atom using some fundamental principle is called its electronic configuration.

Electronic configuration of Manganese:

• The electronic configuration of Manganese at the ground state is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{d}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}3{\mathrm{d}}^{5}4{\mathrm{s}}^2$ or $\left[\mathrm{Ar}\right]3{\mathrm{d}}^{5}4{\mathrm{s}}^2$.