Quantum numbers provide complete information about electrons in an atom.
a. Four sets of quantum numbers are given below. Select the possible set of quantum numbers.
i. `n=3, l=1, m=1, , s=+1 / 2`
ii. `n=4, , l=1, , m=1, s=+1 / 2`
iii. `n=1, l=0, m=0, , s=+1 / 2`
iv. `n=2, l=2, m=1, , s=+1 / 2`
b. Give the quantum numbers of the valencè electron of an atom with atömic number 19.

Explanation

a. ii and iii are possible.

b. .n=4, l=0, m=0, s=(+1) / 2. or .(-1) / 2.