Answer
a. 6p
b. 3s
c. 5d
d. 4s
e. not allowed
Work Step by Step
a. n = 6 (principle), l = 1 (p subshell)
b. n = 3 (principle), l = 0 (s subshell)
c. n = 5 (principle), l = 2 (d subshell)
d. n = 4 (principle), l = 0 (s subshell)
e. There is no f subshell in 2nd shell as l cannot be greater than n - 1