-
455 BCE
Plato
Plato Introduced the atomic theory in which ideals geometric forms serve as atoms -
450 BCE
Democritus
Natural Laws, nothing is actually something, light of stars -
700
The Alchemists
Breaking down the chemical compositon of the 4 basic elements of their time, Fire, earth, wind, and water. -
Robert Boyle
Developed the atomic theory that matter is made up up of tiny particles that he called corpuscles -
Antone Lavoisier
Mass is not destroyed in chemical reactions and named oxygen -
John Dalton
First evidential experiment evidence of the existence of matter -
Amedeo Avogadro
Research on gas, volume, pressure and tempature -
Dmitri Mendeleev
He created the periodic Table -
Robert Millikan
Measured the change of the electrons using his famous oil drop. -
JJ Thompson
Discovery of the Electron using the cathode -
Pierre and Marie Curie
Discovered polonium and radium -
Albert Einstein
Mathematically proved the existence of atoms -
Ernest Rutherford
He discovered the nucleus, set forth the laws of radioactive decay, and identified alpha particles as helium nuclei. -
Plum Pudding Model
Made by JJ thomson and it was a scientific model of the atom -
Henry G.J. Mosely
Henry Mosley discovered a systematic relation between wavelength and atomic number. -
Solar system Model
A mathematical model of the Sun that describes its structure, composition, energy production, and evolution. And was made by Bohr -
Electron Cloud model
The electron cloud model is a model of an atom that shows the most probable position of electrons -
Erwin Schrodinger
He discovered Wave mechanics of electrons in an atom -
James Chadwich
He is responsible of the discovery of the neutron -
Neils Bohr
Quantum concept energy is a system to distain discrete value