Who tryna do these 3 assignments on wizer for me

List four observations that indicate that a chemical reaction may be taking place

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.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable