Question

What are the degeneracies of the first four energy levels

Answer 1

Please correspond yourselves with Hydrogen atom. In Hydrogen atom, in a principal quantum number, all orbitals have the same energy gap, this symptomynous look of critical NMR leads this conclusiuon. On basis of your H- like species taken , no. of degeneracies depend.

WHILE ASKING A QUESTION, PLEASE MENTION CLARITY. ITS SEEMS WEIRD TO ANSWER YOUR QUESTION. PLEAE THINK ON THIS ASPECT DEAR!!!