Which of the following factor may be regarded as the main cause of lan – InterviewSolution

1.	Which of the following factor may be regarded as the main cause of langthanide contraction ?
Answer» POOR shielding of ONE of the 4f-ELECTRONS by another in the subshell Effective shielding of one of the 4f-electrons by anotherin the subshell Poorer shielding of 5d electrond by 4f electrons Greater shielding of 5d electrons by 4f electrons. ANSWER :a

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