Explain diagonal relationship between Li and Mg? Why noble gases have exceptionally high ionisation rnthalpyi

Explain diagonal relationship between Li and Mg? Why noble gases have

1.	Explain diagonal relationship between Li and Mg? Why noble gases have exceptionally high ionisation rnthalpyi
Answer» partLi & MG :-Have similar electonegatives.Li & mg are quite hard. LIOH & Mg(OH)2 are WEAK base. Both form ionic nitride while heating in air. Both decompose on heating and form super oxide & PEROXIDE .Both are soluble in ethanol Cannot able to form SODIUM bicarbonate.Both have high Polarizing power. LI. & Mg. Elecronegaitivity \| 1.0. \| 1.2. Atomic Radii. \| 1.23 \| 1.36 Ionic Radii. \| 0.60 \| 0.65 ___Atomic Volume. \|__12.97__\|____13.97____✳ Second part✳Inert gases are in their most stable form. ✳It is more unfavorable to remove their valence electrons than those of any other atom in the same period. ✳ More energy is required to "pull" a valence electron away from inert gases.________________________________________