Which type of bond happens when electrons are transferred

Part of molten rock at mid-ocean ridges

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 many atoms are there in 5.70 mol of mg