Question

What is the $s\mathit{,}\mathit{}p\mathit{,}\mathit{}d$ and $f$ configuration of $\mathrm{Co}$?

Answer 1

Electronic configuration:

• "The distribution of electrons into orbitals of an atom is called its electronic configuration."
• A standard notation is followed while writing the electronic configuration of an element.

Electronic configuration of Cobalt:

• For cobalt, the atomic number is $27$.
• Therefore, according to Aufbau's principle and the position of cobalt in the periodic table, the $s\mathit{,}\mathit{}p\mathit{,}\mathit{}d$ and $f$ configuration of $\mathrm{Co}$ is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^7$.
• It can also be written as $\left[\mathrm{Ar}\right]4s^{2}3d^7$.