Question

How many electrons in an atom could have these sets of quantum numbers?
n=6
l=1
ml= -1

Answer 1

ml=−2,−1,0,+1,+2.
Since each of these orbitals can hold a maximum of two electrons, one having spin-up and one having spin-down, a total of 10 electrons can share the quantum numbers n = 6 and l = 2.