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History of the Atom Project
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History of the Atom
Eric, Adriel, Juniel, Xina
Democritus (c.460-c.370)
Greece
Democritus theorized that all objects are made of small invisible ‘atoms’
Antoine Lavoisier
(August 26, 1743-May 8,1794)
France
Credited for the discovery of the Law of Conservation of Mass
Louis De Broglie
(August 15, 1892 – March 19, 1987)
Louis De Brogile
introduced the idea that particles, such as electrons, could be described not only as particles but also as waves.
John Dalton
September 6, 1766-July 27, 1844
England
Dalton’s Atomic Theory; Stated all matter was made of atoms
J.J. Thomson
December 18, 1856-August 30, 1940
JJ Thompson
Discovered the Electron; Creator of the Plum Pudding Model
James Chadwick
October 20 1891-July 24 1974
James
Chadwick
Chadwick proved the existence of neutrons
Ernest Rutherford
(August 30, 1871 to October19, 1937)
New Zealand
Rutherford discovered that atoms contain a positively charged nucleus much smaller than the actual atom.
Robert Millikan
(March 22nd, 1868 - December 19th, 1953)
Illinois
Millikan discovered that atoms contain negatively charged particles.
Marie Curie
(November 7, 1867-July 4, 1934)
Poland
Contributed that radiation came from the atom
Max Planck
(April 23, 1858-October 4, 1947)
Germany
Planck introduced the quantum theory
Werner Heisenberg
(December 5, 1901-February 1, 1976)
Würzburg, Germany
Heisenberg found out that particles' positions and momentum cannot be determined precisely.
Erwin Schrodinger
August 12, 1887 – January 4, 1961
Austria
Erwin Schrodinger formulated a wave equation that accurately calculated the energy levels of electrons in atoms.
Albert Einstein
(March 14th, 1879 – April 18th 195)
New Jersey
Albert Einstein mathematically proved the existance of atoms with the Brownian effect in particles.
Niels Bohr
(October 7, 1885-November 18, 1962)
Denmark
Bohr created a model that visually represented how atoms have stable orbits around the nucleus.