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QJEEM05Chdd43: JEE Main 2005 Chemistry - Class 12 JEEM05Chdd43 Solution: Which of the following factors may be regarded as the main…
Which of the following factors may be regarded as the main cause of lanthanide contraction?
Multiple Choice Options
- A Poor shielding of one of 4f electron by another in the subshell
- B Effective shielding of one of 4f electrons by another in the subshell
- C Poorer shielding of 5d electrons by 4f electrons
- D Greater shielding of 5d electrons by 4f electrons
Step-by-Step Verified Solution
The main reason of lanthanide contraction is, poor shielding of 4f electrons on the outer most shell electrons.
In lanthanides, there is poorer shielding of electrons by electrons resulting in greater attraction of the nucleus over electrons and reduction of the atomic radii.
In lanthanides, there is poorer shielding of electrons by electrons resulting in greater attraction of the nucleus over electrons and reduction of the atomic radii.