Practicing Success
What is the correct order of ionic radii of Y3+, La3+,Eu3+ and Lu3+ ? |
Y3+< La3+ < Eu3+ < Lu3+ Lu3+< Eu3+ < La3+ < Y3+ Y3+< Lu3+ < Eu3+ < La3+ Eu3+< La3+ < Lu3+ < Y3+ |
Eu3+< La3+ < Lu3+ < Y3+ |
The correct order of ionic radii of Y3+,La3+,Eu3+ and Lu3+, is Y3+ < Lu3+ < Eu3+ < La3+ because Eu and Lu are the members of lanthanide series (so they show lanthanide contraction) and La is the representative element of all elements of such series and Y3+ ion has lower radii as comparison to La3+ because it lies immediately above it in the periodic table. |