which element has atoms in the ground state with a sublevel that is only half filled?

Question

Choices:

1) helium
2) berylium
3) nitrogen
4) neon

Proof please

Answer 1

The correct answer is 3 Nitrogen

7 electrons as follows 1s2 2s2 2p3 . The sublevel 2p3 can theoretically contain 6 electrons and has only 3


Helium and neon are noble gases. All the sublevels are filled

Beryllium has 4 electrons and 2 on shell K 2 and 2 on sublevel 2s complete