MCQ
All those elements belong to $ f - $ block whose atomic numbers are
- A$58$ to $71$
- B$90$ to $ 103$
- ✓Both $(a)$ and $(b)$
- DNone
✓
Answer
Correct option: C.
Both $(a)$ and $(b)$
c
(c) $58 $ to $71 $ and $ 90$ to $ 103$ (Lanthanides & actinides).
(c) $58 $ to $71 $ and $ 90$ to $ 103$ (Lanthanides & actinides).
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