Question

Describe the diagonal relationship between li and mg with the help of two illustrative properties.

Answer 1

Answer:

Li and Mg shows diagonal relationship as they have many chemical properties in common.

Explanation:

(1)Both Li ---> Li2O + Li3N

and Mg -----> MgO + Mg3N2

form similar compound in presence of air

(2) both have hydrate forming tendency as Licl.2H2O and MgCl2.8H20

Answer 2

Lithium and magnesium show diagonal relationship as they have same polarizing power so elements of second period shows similarities with elements of third period of next group.

Properties which show similarities in lithium and magnesium are:---

1)Both compounds lithium and magnesium form oxides LiOH and Mg(OH)2 both are weak base while hydroxides of other members of their group form strong bases.

2)The carbonates and hydroxides and also nitrates of both lithium and magnesium decompose on heating.

3)Due to small size of li and Mg their hallides are soluble in organic solvents.

4)They form hydrates like LiCl.H2O and MgCl2.2H2O.