Lanthanoid contraction is caused due to:A. The imperfect shielding on outer electrons by 4f-electrons from the nuclear chargeB. The appreciable shielding on outer electrons by 4f-electrons from the nuclear chargeC. The apperciable shielding on outer electrons by 5d-electrons from nuclear chargeD. The same effective nuclear charge from `Ce` to `Lu`

Lanthanoid contraction is caused due to:A. The imperfect shielding on

1.	Lanthanoid contraction is caused due to:A. The imperfect shielding on outer electrons by 4f-electrons from the nuclear chargeB. The appreciable shielding on outer electrons by 4f-electrons from the nuclear chargeC. The apperciable shielding on outer electrons by 5d-electrons from nuclear chargeD. The same effective nuclear charge from `Ce` to `Lu`
Answer» Correct Answer - A

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