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How does actinoid contraction compare with lanthanoid?
ASmaller; strong 5f shielding
BSmaller; poor 5f shielding
CGreater; strong 5f shielding
DGreater; poor 5f shielding
Answer & Solution
Correct answer: D. Greater; poor 5f shielding
The size drop from one actinoid to the next is larger because 5f electrons shield the nucleus poorly.
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