Question

principl quantum number of balanced electron of sodium atom

Answer 1

The atomic number of a Sodium atom 'Na' = 11

So its electronic configuration will be - 1s2 2s2 2p6 3s1

It can achieve the nearest stable configuration by losing one electron. This happens by the loss of one atom from 3s shell to form Na+

Thus, the electron configuration of Na+ will be 1s2 2s2 2p6