Question

the radius of the La3+ is .06A which one of the following given values will be closest to the radius of Lu3+

1)0.85A

2)1.60A

3)1.40A

4)1.06A

plz provide the ans with explaination

Answer 1

Answer:

Answer: 0.85 A

The ionic radii of Ln$^{3+}$ reduces from La$^{3+}$ to Lu$^{3+}$ due to Lanthanide Contraction.

Therefore the lowest value here must be the one closest ionic radii of Lu$^{3+} \rightarrow$ 0.85 A.