Chemistry - f-block Question with Solution | TestHub
Chemistryf-blockf-blockEasy2 minPYQ_2020
ChemistryEasysingle choice
Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers).
Options:
Answer:
B
Solution:
Due to lanthanoid contraction (poor screening effect caused by inner d and f orbitals electrons due to their deeper inside location) atomic radii of Zr and Hf is almost similar.
Zr = 159 pm, Hf = 156 pm
Stream:NTA_ABHYAS_NEETSubject:ChemistryTopic:f-blockSubtopic:f-block
⏱ 2mℹ️ Source: PYQ_2020
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