Question
Question: Lanthanoid contraction is caused due to :...
Lanthanoid contraction is caused due to :
A
The appreciable shielding on outer electrons by 4ƒ electrons from the nuclear charge
B
The appreciable shielding on outer electrons by 5ƒ electrons from the nuclear charge
C
The same effective nuclear charge from Ce to Lu
D
The imperfect shielding on outer electrons by 4f electrons from the nuclear charge
Answer
The imperfect shielding on outer electrons by 4f electrons from the nuclear charge
Explanation
Solution
Lanthanoid contraction is due to ineffective shielding produced by larger f-subshell.