[" The steady decreases in the ionic radius from "],[La^(3+)" to "Lu^(3+)" is termed as "]

La^(3+) and Lu^(3+) are

The correct order of ionic radii of Y^(3+), La^(3+), Eu^(3+) and Lu^(3+) is :

The correct order of ionic radii of Y^(3+), La^(3+), Eu^(3+) and Lu^(3+) is :

There is continuous decrease in atomic radii from Lanthanum (La) to Lutetium (Lu). Give reason. What are its consequences ?

The correct order of ionic radii of Y^(3+) , La^(3+) , Eu^(3+) and Lu^(3+) is