JIPMER2017Chemistryd and f Block Elements
The correct increasing order of ionic radii of the following Ce ³⁺, La ³⁺, Pm ³⁺ and Yb ³⁺ is
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
Due to lanthanide contraction, size of +3 ions decreases from La ³⁺ to Lu ³⁺ .