Chemistry - Complete s-block Question with Solution | TestHub

The stability of alkanline earthmetal hydrides decreases down the group as with the increase in size of cation the strength of$\mathrm{M}-\mathrm{H}$decreases. so,$\mathrm{B}\mathrm{e}{\mathrm{H}}_2$is most stable while$\mathrm{B}\mathrm{a}{\mathrm{H}}_2$is least stable.