JEE MAIN - Chemistry (2019 - 12th January Evening Slot - No. 5)
The correct order of atomic radii is :
Ho > N > Eu > Ce
Ce > Eu > Ho > N
N > Ce > Eu > Ho
Eu > Ce > Ho > N
Explanation
In lanthanide series from left to right atomic radius decreases but the exception is Europiun (Eu) and Ytterbium (Yb).
So the correct order is : Eu > Ce > Ho > N
So the correct order is : Eu > Ce > Ho > N
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