What happeas when alkali metals react with halogens?

Explanation

Alkali metals reacts with halogens vigorously to from metal halides.
`2 M + X_(2) to 2M^(+) X^(-)` (metals halide)
Ex: `2Na + CI_(2) (g) overset(Delta)(to) underset("Sodium chloride")(2Na^(+) CI^(-))`