What procedure do scientists use to make new discoveries?

What does x represent in the formula for the compound xcl4?

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.

When a septic tank backs up a goes in to clean it out