1. Historical perspective

In the years before Bohr formulated his theory of the atom, based upon the principles of quantum physics, some steps had been made on the understanding of the atomic structure. We list here some important contributions:

Atomic Models

Thomson's model Rutherford's model

All these contributions, mentioned above, lead jointly to a conception of the structure of atoms. There is however another branch of research that has in the past, and as of today, taught us most about the structure of atoms and molecules.

Last change: 6 February 2001