Question

what are the four quantum numbers of the 19th electron in sc (z=21)

n=4, l=0, m=0, ms=0
n=4, l=0, m=0, ms=+1/2
n=4, l=0, m=1, ms=+1/2
n=4, l=1, m=1, ms=+1/2

Answer 1

the ans is n =4,l=0,m=0,s=+1/2.