Question

Which of the following pairs of elements possess diagonal relationship?
(A) Li and Mg
(B) Li and Al
(C) Na and Mg
(D) Cs and Ba

Answer 1

A diagonal relationship exists in the elements if the element is present at the adjacent to each other diagonally.

Li and Mg are the only pairs which posses the diagonal relationship.

1) Li and mg are similar in size.

2) Li and Mg have a high melting point than the other elements in their individual groups.

3) The smaller the volume of an ion, the more greatly hydrated it is.

Among the above alkali metals, Li is least in size and water molecules is polarized by Li-ion more simply than the other metals, Which causes the attraction of water molecules to lithium salts as the water of crystallization.

Answer 2

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☸ Required Answer is ⬇⬇ ⬇⬇ ⬇

⭕ A). Li and Mg

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