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Introduction to p Block Elements

Lanthanoid co...

Question

Lanthanoid contraction is due to increase in:

A

Atomic number

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B

Size of 4f orbital

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C

Effective nuclear charge

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D

Shielding by 3f electrons

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Solution

The correct option is C
Effective nuclear charge

The steady decrease in atomic and ionic sizes of lanthanoid elements with increasing atomic number is called lanthanoid contraction.

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