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Reason of lanthanide contraction is...

Reason of lanthanide contraction is

A

negligble sereening effect of f-orbital

B

increasing unuclear charge

C

decreasing nuclear charge

D

decreasing screening effect

Text Solution

Verified by Experts

The correct Answer is:
A
On account of poor shielding effect of `f`-electrons, nucleus exerts a strong attraction as atomic number increase and thus size of atom decrease.
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