MCQ
The property seen in $f-$block elements is:
- ALanthanoid contraction.
- BActinide contraction.
- ✓Both $(A)$ and $(B).$
- DLanthanoid expansion.
✓
Answer
Correct option: C.
Both $(A)$ and $(B).$
The property seen in $f-$block elements are Lanthanoid contraction and Actinide contraction. Lanthanide contraction is a term used in chemistry to describe the greater than expected decrease in ionic radii of the elements in the lanthanide series.
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