Susana heats up a sample of red crystals. while the sample is being heated, a gas is released and a blue powder is left after the heating. is the sample of red crystals an element or a compound? explain your answer.

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

Heat is the total potential energy of a substance that can be transferred. true false