Assertion (A): Lithium resembles magnesium diagonally placed in group 2.
Reason (R ): The sizes of Li and Mg atoms and their ions are nearly the same.

Assertion: Lithium resembles magnesium diagonally placed in next group. Reason: The size of Li^(+) and Mg^(2+) are different and their electropositive character is same.

Assertion: Lithium resembles magnesium in its properties Reason: The ratio of ionic charge to "(Ionic radius)"^2 is almost same for Li^+ and Mg^(2+)

Lithium resembles magnesium in some respects though placed in a different group.

Assertion : Lithium is in diagonal relationship with magnesium Reason : Li^+ has same size as Mg^(2+)

Assertion (A): Lithium salt are more soluble than salts of other metals of group-I Reason (R): The high solubility of Li salts is due to strong solvation of small size of Li ion.

Assertion (A): Lithium chloride is predominantly covalent compound. Reason (R ): electronegativity difference between Li and CI is small.