When the energy is 3.37x 10^-19 J, what is the frequency

Can someone me with these questions plz.

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.

Compare and contrast solutions and suspensions