NEETChemistryd and f Block Elements
What is the consequence of the lanthanoid contraction?
Options
- AZr and Hf have significantly different radii.
- BZr and Hf have identical radii.
- CZr has a larger radius than Hf.
- DHf has a larger radius than Zr.
Correct answer
B. Zr and Hf have identical radii.
Step-by-step solution
The almost identical radii of Zr (160 pm) and Hf (159 pm), a consequence of the lanthanoid contraction, account for their occurrence together in nature and for the difficulty faced in their separation