Home Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius The lanthanide contraction refers to:
Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius Single Correct MCQ
Published on: August 12, 2026

The lanthanide contraction refers to:

A
radius of the series.
B
valence electrons of the series.
C
the density of the series.
D
electronegativity of the series.

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The correct answer is:
A

Due to 4f-orbital electrons (poor shielding effect), there is increase in effective nuclear charge which leads to the contraction of the size of atoms. This is called lanthanide contraction.

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