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Chemistry
Which of the following factors may be regarded as the main cause of lanthanide contraction ?
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Q. Which of the following factors may be regarded as the main cause of lanthanide contraction ?
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The d-and f-Block Elements
A
Greater shielding of 5d electron by 4f electrons
B
Poorer shielding of 5d electron by 4f electrons
C
Effective shielding of one of 4f electrons by another in the sub-shell
D
Poor shielding of one of 4f electron by another in the sub-shell
Solution:
Lanthanide contraction is due to poor shielding of one of 4f electron by another in the sub-shell.