The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus ... When the balloon is rubbed on hair or clothes, electrons move onto the balloon giving it a negative ...

He suggested that an atom was a tiny solid ... showed it had limitations. The electrons should just spiral in towards the positive nucleus. Electrons move in fixed orbits, called electron shells ...

His particular bone of contention was the Bohr–Sommerfeld model of the atom, named after the two ... an unfinished revolution By supposing that electrons move in elliptical orbits around an ...

As they move through the metal, free electrons crash into metal ... ions and by passing vibrations from atom to atom. Conduction by collisions between fast moving free electrons is very much ...