Based on lattice energy and other considerations,which one of the following alkali metal chlorides is expected to have the highest melting point?

All the $s$-block elements of the periodic table are placed in the groups...

$A$ metal $M$ reacts with $N_2$ to form a compound $A$ $(M_3N)$. Heating $A$ at a high temperature gives back $M$,and passing $A$ through $H_2O$ results in the evolution of gas $B$. Gas $B$ turns $CuSO_4$ solution blue. What are $A$ and $B$ respectively?

How is magnesium obtained from the following?

As the atomic number increases,which of the following properties of alkali metals increases?

Discuss the diagonal relationship of lithium with magnesium.