Question

What is the electron configuration of sodium ion?

Answer 1

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

Electronic configuration of Sodium $\left(\mathrm{Na}\right)$:

• Sodium is an alkali metal having atomic number 11.
• Therefore, the electronic configuration will be $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^1$.

Electronic configuration of Sodium-ion $\left({\mathrm{Na}}^{+}\right)$:

• The sodium atom loses one electron to attain a noble gas configuration and form a sodium ion.
• Therefore, the electronic configuration for sodium-ion will be $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$.