Write a note about saline (or) ionic hydride.

Explanation

Ionic hydrides composed of an electro positive metal, generally I an alkali or alkaline earth metal ( except beryllium and magnesium) formed by transferring of electrons from metal to hydrogen atoms. They can be prepared by the reaction of elements at about `400^(@)C`
`(M^(n+))`
`2Li_((s))+H_(2(g))to2LiH_((g)` (Lithium hydride)
`2Ca_((s))+H_(2(g))to2CaH_(2(g))` ( Calcium hydride)