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500 BCE
The Alchemists
The alchemists layed down the foundation of the modern periodic table and discovered a substance that could turn normal metals into gold. Brittanca.com
prezi.com -
427 BCE
Plato
Introduced the atomic theory sutori.com -
400 BCE
Democritus
Theorized that all material things are composed of atoms. Brittanica.com -
Robert Boyle
Supported the idea that all material is composed of fundamental particles from particles from which all other materials are constructed. Study.com -
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John Dalton
He proposed that atoms composed all matter and created the billiard ball model. Course.lumenlearing.com -
Amedeo Avogadro
Created the avogrodo number to calculate chemical reactions. brittanica.com -
Dmitri Mendeleev
Devised the periodic classification of the chemical elements. brittanica.com -
JJ Thompson
Discovered the Electron and created the plum pudding model. Sutori.com -
Pierre and Marie Curie
Discovered the strongly radioactive elements known as polonium and radium. brittanica.com -
Ernest Rutherford
Determined there were 2 types of radiation, those being alpha and beta, and created the solar system model. Sutori.com -
Albert Einstein
Mathematically proved the existence of atoms. Brittanica.com -
Robert Millikan
Successfully determined the magnitude of the electrons charge nobelprize.org -
Neils Bohr
Proposed a theory for the hydrogen atom based on the quantum theory. Nobelprize.org -
Henry G.J Mosely
He created Mosely's law which is characterized considering x-rays that are produced by atoms. Sutori.com -
Erwin schrodinger
He used mathematical equations to describe the likelihood of finding an electron in a certain position. brittanica.com -
Werner Heisenburg
Created the uncertainty principle and theory of quantum mechanics. brittanica.com -
Erwin Schrodinger
Used mathematical equations to describe the likelihood of finding an electron to a certain position and created the electron cloud model. Brittanica.com -
James Chadwich
James Chadwich discovered the neutrons, a part of the atom. brittanica.com -
James Chadwich
Discovered neutrons, a part of the atom. brittanica.com
