What kind of reaction is potassium+ nitrogen

What overall charge must all compounds have

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

Consider the story you just read. all but one of the choices below indicate that something is living.