Manipal MET2014Chemistryd and f Block Elements
Due to lanthanide contraction
Options
- AFe , Co , Ni have equal size
- BZr and Hf have equal size
- Call f -block ions have equal size
- Dall isoelectronic ions have equal size
Correct answer
B. Zr and Hf have equal size
Step-by-step solution
The lanthanide contraction cancels almost exactly the normal size increase on descending a group of transition elements. Thus, Zr and Hf have equal size.