Chemistry - f-block Question with Solution | TestHub

Due to lanthanide contraction , the ionic radii of${\text{Ln}}^{3+}$( lanthanide ions ) decreases from${\text{La}}^{3+}$to${\text{Lu}}^{3+}.$Thus the lowest value ( here$0.85\mathrm{ }\stackrel{\circ }{\text{A}}$is the ionic radius of${\text{Lu}}^{\text{3+}}\text{.}$