MCQ
$5f$ series elements are known as $.......?$
- ALanthanides.
- BRepresentative elements.
- CTransition elements.
- ✓Actinides.
✓
Answer
Correct option: D.
Actinides.
Actinides are also called the $5f$ series.
Filling up of the $5f$ orbitals after actinium $(Z = 89)$ gives the $5f-$inner transition series known as the actinoid series.
Filling up of the $5f$ orbitals after actinium $(Z = 89)$ gives the $5f-$inner transition series known as the actinoid series.
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