Q63 · CSIR-NET Chemistry, December 2015

Paper: CSIR-NET December 2015 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Easy

The metallic radii are abnormally high for which of the following pairs?

(a)Eu, Yb

(b)Sm, Tm

(c)Gd, Lu

(d)Nd, Ho

Answer

Answer: A ✓ checked by 4AB · confidence high

Explanation

Eu and Yb contribute only two electrons to the metallic bond (keeping f⁷ and f¹⁴), so their metallic radii are anomalously large.

Study loop for Lanthanides and Actinides