Almost everytime a new discovery about the atom is made, our atomic models have to be changed.
(NOTE: A VRML plugin such as Cosmo Player is necessary to view the models.)

	Plum Pudding Model (Sir John J. Thomson) The Plum Pudding Model consisted of a positively charged fluid - the 'pudding' - which contained small, negatively charged particles - the 'plums'.  (Opens in new window)
	Bohr Model of the Atom (Niels Bohr) The Bohr Model utilized the idea of electrons orbiting a central nucleus. (Opens in new window)
	Quantum Model of the Atom (Erwin Schrodinger) The Quantum Model uses probability "clouds" to estimate the location of the electrons orbiting the nucleus. (Opens in new window)