All matter is made up of atoms.  which sentence correctly describes atoms?   aan atom is the smallest particle of an element.  batoms are the smallest particle of a nucleus.  can atom is a substance that has been cut in half.  dall substances are made of the same atoms.

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.