MHT CET · Chemistry · d and f Block Elements
Which among the following lanthanoids has smallest atomic size?
- A \(\operatorname{Pr}\)
- B \(\mathrm{Ce}\)
- C \(\mathrm{Sm}\)
- D \(\mathrm{Pm}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Sm}\)
Step-by-step Solution
Detailed explanation
Atomic size decreases across the series from left to right.
\(\mathrm{Ce}>\mathrm{Pr}>\mathrm{Pm}>\mathrm{Sm}\)
\(\mathrm{Ce}>\mathrm{Pr}>\mathrm{Pm}>\mathrm{Sm}\)
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