Question

What is the electron configuration for ${\mathrm{Al}}^{3+}$?

Answer 1

Aluminum:

• Aluminum is a p-block element having an atomic number $13$ and an atomic symbol $\mathrm{Al}$.
• It belongs to Group-$13$ and third period.

Electronic configuration of Aluminum:

• The electronic configuration of Aluminum is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^1$.

Electronic configuration of ${\mathrm{Al}}^{3+}$:

• When the Aluminium $\left(\mathrm{Al}\right)$ atom loses three electrons, it forms ${\mathrm{Al}}^{3+}$ ion.
• The electronic configuration of ${\mathrm{Al}}^{3+}$ is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^6$.
• So, in the +3 oxidation state aluminium attain the noble gas electronic configuration.