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430 BCE
Plato
He came up with the theory of vision. -
400 BCE
Democritus
Came up with the atomic theory of the universe. -
800
The Alchemists
The Alchemists were a group that believed all medals were made of Sulfer and Mercury. -
Robert Boyle
He is known for Boyle's law. He researched gas being inversely -
Antone Lavoisier
He was a French chemist. He researched quantative chemical experiments. He revolutionized chemistry. He reacted oxygen with inflammable air. -
John Dalton
He introduced Atomic theory in chemistry. -
Billiard Ball Model
Model of an atom. -
Amedeo Avogadro
Found that equal volumes of gases at the same temperature and pressure contain the same amount of molecules. -
Dmitri Mendeleev
He came up with the periodic table. -
JJ Thompson
He discovered the existence of the electron. -
Pierre and Marie Curie
Found the existence of radium and polonium. -
Robert Millikan
He found the magnitude of an electrons charge. -
Plum Pudding Model
Made by JJ .Thompson. Shows atoms containing negatively charged subatomic particles or electrons. -
Ernest Rutherford
He discovered the existence of the nucleus and atom. -
Henry G. J. Mosely
Found the x-ray spectra of various chemical elements. -
Solar System Model
Made by Neils Bohr. New model of an atom. -
Albert Einstein
Came up with the theory of relativity. -
Neils Bohr
He came up with quantum theory and understanding atomic structure. -
Werner Heisenberg
discovered that allotropic forms of hydrogen. -
Erwin Schrodinger
He formulated a wave equation that calculated energy levels of electrons. -
Electron cloud model
Made by Erwin Schrodinger. It shows the position of an electron in an atom. -
James Chadwich
He proved the existence of neutrons.