1.

Write one similarity and one difference between the chemistry of lanthanoids and actinoids?

Answer»

Similarity : (i) Both show contraction in size. (ii) Both show irregularity in their electronic configuration (iii) Both are stable in + 3 oxidation state. (Any one)

Difference : (i) Actinoids are mainly radioactive but lanthanoids are not (ii) Actinoids show wide range of oxidation states but lanthanoids do not

(iii) Actinoid contraction is greater than lanthanoid contraction. (any other one similarity and one difference.



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