Question

What is the total number of orbitals and electron for m=0 if there are 30 proton in an atom?

Answer 1

So the atom (mentioned) has electrons. In each subshell (including s), there will be one orbital having m=0 which contains two electrons. Thus total number of subshells here is 7. So there are 7 orbitals with m=0 and each having 2 electrons.