Help please!! Would really appreciate it

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.

How are isotopes of the same chemical element alike? how are they different?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?