How many 1s energ

One mole of sodium vapor has 6.02 × 10²³ atoms (Avogadro’s number). A sodium atom has atomic number 11. The electronic configuration of sodium is.

Therefore, there are 2× 6.02 × 10²³ = 12.04 × 10²³ (number of electrons occupying a state × Avogadro' s number) 1s energy states in one mole of sodium vapor and they are all filled in normal conditions.

Also, there are 1×6.02× 10²³ = 6.02× 10²³. 3s energy states in one mole. The 3s energy states is partially filled in normal conditions.