The f subshell has a total of seven orbitals, which are designated by the letters:
- 4f subshell:
- 4f₅/₂
- 4f₇/₂
- 4f₅/₂
- 4f₇/₂
- 4f₇/₂
- 4f₇/₂
- 4f₇/₂
These orbital designations represent the angular momentum quantum numbers (l) and the total electron spin quantum numbers (s) associated with each orbital. The f subshell has a complex shape and can hold a maximum of 14 electrons.