What is the action of alkali metals with hydrogen?

Explanation

Alkali metals react with hydrogen to form ionic hydries.
`2M + H_(2) overset(Delta)(to) 2M^(+) H^(-)` (Metal hydride)
Ex: `2Li + H_(2) overset(1.073 K)(to) 2Li^(+) H^(-)` (Lithium hydride)
`2Na + H_(2) overset(673K)(to) 2Na^(+) H^(-)` (sodium hydride).