Atom Theory Timeline

John Dalton was an English chemist, meteorologist, and physicist. He became famous for the development of the atomic theory.

A German physicist that discovered cathode rays by studying discharge tubes. The cathode rays were later renamed to electrons, the 1st subatomic particle.

A German physicist who developed te general theory of relativity. He displayed this theory in 1905 by using the equation E=mc²

A British physicist and Nobel Prize laureate. Recived the Nobel Prize for the discovery of the electron.

A New-Zealand Born British physicist. He won a Nobel Prize in 1908 for his investigations into the disentegration of element, half lives, and the chemistry of radioactive substances.

Millikan's earliest major success was the accurae determinaton of the charge carried by an electron using the "falling-drop method". He also proved that this quantity was a constant for all electrons, which demonstrated the atomic structure of electricity.

Millikan verified Einstein's very important photoelectric equation, and made the first direct photoelectric determination of Planck's cnstant.

Millikan verified Einsteins's very important photoelectric equation experimentally, and made the first direct photoelectric determination of Planck's constant.

AnEnglish physicist. His man contribution to physics and science was he justification from pysical laws of the previous emperical and chemical concept of the atomic number.

Neils Bohr did major work regarding the structure of the atom. He stated that electrons have set energy levels and created a realistic model.