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460
Democritus
Democritus created the atomic theory consisting of atoms make up everything and they are in constant motion forever -
Period: 460 to
History Of The Atom
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Antoine Lavoiser
-He developed a new system for the common naming of chemicals and showed that oxygen was in all acids -
John Dalton
- He discovered/made the atomic theory for atoms and experimented in atomic weights
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Dmitri Mendeleev
Dmitri formulated the Periodic law and formed his own Periodic table. -
Eugen Goldstein
Goldstein discoverd canal rays, also called positive rays; these are positively charged ions that are accelerated toward and through a perforated cathode in an evacuated tube. -
J.J. Thomson
Made dicoverys conserning how a atoms sphere is a positive form of matter that has electrons positioned by different forces -
Max Planck
Planck originated the quantum theory of atoms -
Robert Millikan
-He made advancements in the electronic charges in his photoelectric work -
Ernest Rutherford
-He had dicovered alpha and beta rays, then making the laws of radioactive decay -
Niels Bohr
-He investigated how the eclectron do not move randomly around a atom rather they move in specific paths by energy levels. -
Erwin Schrodinger
Schrodinger added a lot to the quanatum theory advanceing it, later on he formulated the wave equation and revealed the identity of his development of the formalism and matrix mechanics. -
Henry Moseley
Henry invented the first atomic battery which lead to the process of the discovery of Moseley's law. Moseley's law is an empirical law concerning the characteristic x-rays that are emitted by atoms. -
James Chadwick
-He had discovered the parts and the neutron itself -
Werner Heisenberg
Werner was a key pioneer to the success of quantum physics. The paper that was written on it earned Werner a Noble Peace Prize for his discoveries
