The number of micro states corresponding to the atomic term symbol ⁴F is

Concept:

Atomic term symbol can be given as:

^2s+1L

where: 2s + 1 → Spin multiplicity

L → orbital angular momentum

value of L can be given as:

       s    p     d     f      g ...

L→ 0    1    2     3     4

Now,

{No. of microstates for a given term = (2L + 1)(2s + 1)}

Explanation:

Given atomic Term: ⁴f

∴ L = 3, 2s + 1 = 4

∴ No. of microstates = (2 × 3 + 1) × 4

= 28

∴ option '3' is correct.

Conclusion:-

No. of microstates in atomic term symbol

⁴F is 28.