# What are the values of n and l for the last subshell of Na (Z=11) and B (Z=5)? What are their shapes?

May 5, 2017

The electronic configuration for Sodium is 1${s}^{2}$2${s}^{2}$2${p}^{6}$3${s}^{1}$

In Sodium the last electron is in 3s subshell, which is spherical in shape.

The electronic configuration for Boron is 1${s}^{2}$2${s}^{2}$2${p}^{1}$

In Boron the last electron is in 2p subshell, which is dumb bell in shape.