Question

How many electrons in an atom can share the quantum numbers n=2, l=1 and ml=1?

8

6

4

2

Answer 1

n=2,
l = 1 i.e. a p orbital. which is three fold degenerate. i.e. a p orbital has 3 degenerate orbitals.
ml = 1 means one orbital out of those three orbitals.

and a single orbital can contain 2 electrons.
so, the answer is D

Answer 2

is there any difficulty?