question_answer 86)

(a) How many sub-shells are associated with \[n=4\]? (b) How many electrons will be present in the subshells having \[{{m}_{s}}\] value of for \[n=4\]?

Answer:

(a) For \[n=4,\,\,l=0,\,1,\,2,\,3\] (4s, 4p, 4d, 4f) i.e., four subshells are associated. (b) For \[n=4,\] total number of electrons = \[2{{n}^{2}}\] Out of these electrons, half will have anticlockwise spin \[({{m}_{s}}=-1/2)i.e.,16.\]