Practice question

MCQ

Question

The actinoid contraction is greater than lanthanoid contraction due to poorer shielding by:

Options

Choose one · Correct answer highlighted

4d electrons 6s electrons 3d electrons 5f electrons Correct

Explanation

5f orbitals shield less effectively than 4f orbitals, increasing effective nuclear charge and contraction in actinoids. This follows from NCERT principle where relation explains outcome clearly for students.

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