Give the full set of quantum numbers for the electron lost when a Cs atom ionizes.

Question

a. n = 6; l = 1; ml = –1; ms = +½
b. n = 5; l = 0; ml = +1; ms = –½
c. n = 5; l = 0; ml = 0; ms = –½
d. n = 6; l = 0; ml = 0; ms = +½

I am really am not sure but I think its b

Answer 1

Isn't Cesium in period 6?