Question

Determine all possible values of each quantum number (n, l, ml, and ms) for electrons in both the 2s and 2p subshells.
for 2s the the quantum number would be -1/2,0,1/2 right?

Answer 1

That is partly right.
For 2s:
N = 2
l = 0
ml = 0
ms = +/- 1/2 for each electron

For 2p:
N = 2
l = 1
ml = -1,0,+1
ms = +/- 1/2 for each electron