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Democritus was an ancient greek philosopher who introuduced the whole idea of atomos, which are better known today as atoms.
More Information: http://www.egs.edu/library/democritus/biography/
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John Dalton was a scientists who revived Democritus' idea of the atom. His theory later became known as Dalton's Theory.
More Information: http://dl.clackamas.cc.or.us/ch104-04/dalton's.htm
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Amadeo Avogrado stated that everything has a ration; that they react with each other in fixed proportions.
More Information: http://www.chemistryexplained.com/Ar-Bo/Avogadro-Amedeo.html
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Henri Becquerei discovered radio activity by leaving uranuim on a glass and it expanded and developed. He stated that the uranuim was making radition by itself.
More Information: http://www.chem.duke.edu/~jds/cruise_chem/nuclear/discovery.html
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The Curie's discovered other metals that were radioactive.
More Information: http://www.nobelprize.org/nobel_prizes/themes/physics/curie/
Image Taken From: http://www.espci.fr/en/news/2012-371/slide-show-marie-curie-and-espci-a-history -
Thomson's experiments declared that atom contains electrons and was embedded thoughout a positvely charged sphere, just like chocolate chips in cookie dough.
More Information: http://www.chemheritage.org/discover/online-resources/chemistry-in-history/themes/atomic-and-nuclear-structure/thomson.aspx
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Albert Einstein wrote a paper explaining that light absorption can release electrons from atoms, which later became known as the photoelectric effect.
More Information: http://www.nobeliefs.com/atom.htm
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Rutherford was the scientists who made atomic bullets shoot through a gold leaf, behind the leaf was a fluorescent screen so he could watch the impact.He thought that electrons orbited the center of th atom, like how planets orbirt the sun.
More Information: http://www.nobeliefs.com/atom.htm
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James Chadwick concluded that the nuclues contained postive protons and neutrons.
More Information: http://jameschadwickatomictheory.weebly.com/
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Niels Bohr was the one who hypothesised that electrons traveled in orbits around the atom's nucleus.
More Information: http://www.nobeliefs.com/atom.htm
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Pauli concluded that the electron spins while orbits the nuceus. He also concluded that the electron spins in two directions.
More Information: http://www.nobeliefs.com/atom.htm
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Broglie suggested that since light exists as particles and waves they should behave like waves. He later showed how in his experiments, using Einstein's equation.
More Information: http://www.nobeliefs.com/atom.htm
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Werner Heisenberg had a theory which he called the matrix machanics which explained the behavior of atoms.
More Information: http://www.nobeliefs.com/atom.htm
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Erwin Schrödinger was an Austrian physicist who thought why not experiment more with the waves and make a model. His model later then showed waves, but travled in vibrated circles.
More Information: http://www.nobeliefs.com/atom.htm
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Paul Dirac declared that protons transmited an electromagnetic force. This theory was later called the quantum electrodynamics, developed byRichard Feynman, Julian Schwinger, and Sin-Itiro in the late 1940s.
More Information: http://www.nobeliefs.com/atom.htm
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Anderson discovered an anti-electron. Physicists later called it the positron.
More Information:
Image Taken From: http://www.nobeliefs.com/atom.htm http://www.nobelprize.org/nobel_prizes/physics/laureates/1936/. -
Hideki Yukawa thought that the exchange of forces might have described the stronge forces of nucleons, he used Heisenberg's uncertainty principle to explain.
More Information: http://www.nobeliefs.com/atom.htm
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Cecil F. Powell was a physicist who detected the particle that Hideki Yukawa needed and was searching for and called it the pion.
More Information: http://www.nobeliefs.com/atom.htm
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Murray created a method for classifying all the particles, which later became known as the Eightfold Way.
More Information: http://www.nobeliefs.com/atom.htm
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The Electron Cloud of Probability stated that electrons don't follow fixed orbits but tend to occur more frequently in specific areas around the nucleus at any time.
More Information: http://www.physicsforums.com/showthread.php?t=49895
Image Taken From: http://solarwiki.ucdavis.edu/The_Science_of_Solar/1._Basics/A._Introductory_Physics_for_Solar_Application/I._Atoms_and_Materials/3._Atoms_and_Orbitals
