Question

Which of the following is not the permissible arrangement of electrons in an atom?

Options

• n = 5, l = 3, m = 0, s = `+1/2`

• n = 3, l = 2, m = −3, s = `−1/2`

• n = 3, l = 2, m = −2, s = `-1/2`

• n = 4, l = 0, m = 0, s = `−1/2`

Answer 1

n = 3, l = 2, m = −3, s = `bb(−1/2)`

Explanation:

m = −l to +l, through zero thus for l = 2, values of m will be −2, −1, 0, +1, +2.

Therefore for l = 2, m cannot have the value −3.