Question

Give the values of quantum numbers for the electron with the highest energy in sodium atom.

Answer 1

For Na 1s^2 2s^2 2p^6 3s^1
For highest energy
n=3 l=0 m=0 s=1/2
So that n+l is highest

Answer 2

For Na 1s^2 2s^2 2p^6 3s^1, for highest energy, n=3 l=0 m=0 s=1/2, and thus, it is calculated and So that n+l is highest.

In fact, the electron with the highest energy can be measured by taking sodium atom with the highest valence electron in single electron presents in 3s orbital.