Statement A: The Actinide contraction is more as compared to the lanthanide contraction.

Question

Statement A: The Actinide contraction is more as compared to the lanthanide contraction.

Statement B: 5f electrons have much lower shielding effect as compared to 4f electrons because 5f-orbitals are less diffused than 4f-orbitals.

Statement C: For f-block elements with increase in number of f-electrons, the radius decreases due to poor shielding of f-electrons.

Statement D: f-block elements belongs to 3rd group of long form of periodic table.

The correct statements are:

Smart Achievers · Accepted Answer

(3)

The correct statement for B is 5f electrons have much lower shielding effect as compared to 4f electrons because 5f-orbitals are more diffused than 4f-orbitals.

Solution

1 AB

2 ABC

3 ACD

4 A only

Ans.
(3)

The correct statement for B is 5f electrons have much lower shielding effect as compared to 4f electrons because 5f-orbitals are more diffused than 4f-orbitals.

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