JEE Main2002Chemistryd and f Block ElementsActual
Arrange Ce ⁺³, La ⁺³, Pm ⁺³ and Yb ⁺³ in increasing order of their ionic radii
Options
- AYb ⁺³ < Pm ⁺³ < Ce ⁺³ < La ⁺³
- BCe ⁺³ < Yb ⁺³ < Pm ⁺³ < La ⁺³
- CYb ⁺³ < Pm ⁺³ < La ⁺³ < Ce ⁺³
- DPm ⁺³ < La ⁺³ < Ce ⁺³ < Yb ⁺³
Correct answer
A. Yb ⁺³ < Pm ⁺³ < Ce ⁺³ < La ⁺³
Step-by-step solution
According to their positions in the periods, these values are in the order : This is due to lanthanide contraction