A student heats a liquid on a burner. What happens to the portion of liquid that first begins to warm? It loses energy.
It becomes less dense.
It sinks downward.
Its molecules get closer together.

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.