Question

The maximum number of 4f electrons having spin quantum number, $s=\frac{-1}{2}$ is:

• A. 14
• B. 7
• C. 1
• D. 3

Answer 1

The correct option is B 7

Maximum number of electrons present in 4f orbitals are 14. Half of the electrons will have $+\frac{1}{2}$ spin and rest half will have $-\frac{1}{2}$ spin