The following three problems are about the following situati

The following three problems are about the following situation: You will be given an element in its ground state energy level. Determine what is a possible set of quantum numbers (n, 1, m1,ms) for the outer electron. Helium (1,0,0,+1/2) (1,1,0,+1/2) (1,0, 1,+1/2) (1, 1,0,-1/2) (1,0, 1,-1/2) 10) Oxygen (2,0, 1,+1/2) (2,0, 1,-1/2) (2, 1,-1,+1/2) (2, 0, -1, +1/2) (2, 0, -1, -1/2) 11) Calcium (3, 1,0,+1/2) (3, 1, 1,+1/2) (4, 2, 0, +1/2) (4,2, 1,+1/2) (4, 0, 0, +1/2)

Solution

9) Correct option is (a)

He Atomic number 2

electronci configuration 1s^2

n =1 ,

for s, l =0,

ml =0

ms = 1/2

(1,0, 0, 1/2)

10) Correct option is (c)

Oxygen Atomic number 8

electronci configuration 1s^2 2s^2 2p^4

n =2 ,

for p, l =1

ml =2l+1 = (2*1)+1 =3

-1,0,1

ml =-1

ms = 1/2

(2,1, -1, 1/2)

11) Correct option is (e)

Calcium Atomic number 20

electronci configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

n = 4 ,

for s, l =0,

m =2l+1 = 1,

ml =0

ms = -1/2

(4,0, 0, 1/2)