physical observables determined by quantum numbers: n, l, ml, ms

indie452

exam practise question:

what are the physical observables determined by the quantum numbers n, l, m_l and m_s of the electron in a hydrogen atom.

most places just give the equation or the name not the physical observable determined.
so is this right?:-

n = principal number determines the energy state that th atom is in
l = azimuthal number i know is to do with the orbital angular momentum, does this determine the angular momentum state?
m_l = magnetic quantum number associated with angular momentum
m_s = magnetic quantum number associated with spin and if we have spin +1/2 then the electron will have a higher energy then if it was -1/2

and thats all i know.
any help would be great.