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400
Democritus
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/
Image taken from: http://www.prweb.com/releases/2009/10/prweb2992884.htm -
Period: 400 to
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John Dalton
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
Image Taken From: http://en.wikipedia.org/wiki/John_Dalton -
Amadeo Avogadro
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
Image Taken From: http://molechemistry.info/ -
Henri Becquerei
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
Image Taken From: http://www.nobelprize.org/nobel_prizes/physics/laureates/1903/becquerel-facts.html -
Marie and Pierre Curie
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 -
Joseph John Thomson
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
Image Taken From: http://nautilus.fis.uc.pt/wwwfi/figuras/fisicos/txt/thomson.html -
Albert Einstein
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
Image Taken From: http://www.abc.net.au/news/2012-02-23/albert-einstein-sticks-out-his-tongue-at-photographers/3847552 -
Lord Ernest Rutherford
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
Image Taken From: http://www.theprow.org.nz/yourstory/ernest-rutherford-early-life/#.UmX4i1Ckq5o -
James Chadwick
James Chadwick concluded that the nuclues contained postive protons and neutrons.
More Information: http://jameschadwickatomictheory.weebly.com/
Image Taken From: http://en.wikipedia.org/wiki/James_Chadwick -
Niels Bohr
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
Image Taken From: http://en.wikipedia.org/wiki/Niels_Bohr -
Wolfgang Pauli
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
Image Taken From: http://en.wikipedia.org/wiki/Wolfgang_Pauli -
Louis de Broglie
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
Image Taken From: http://www.biografiasyvidas.com/biografia/b/broglie.htm -
Werner Heisenberg
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
Image Take From: http://en.wikipedia.org/wiki/Werner_Heisenberg -
Erwin Schrödinger
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
Image Taken From: http://www.nobelprize.org/nobel_prizes/physics/laureates/1933/schrodinger-facts.html -
Paul Dirac
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
Image Taken From: http://epress.anu.edu.au/maverick/html/ch03.html -
Carl Anderson
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
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
Image Taken From: http://en.wikipedia.org/wiki/Hideki_Yukawa -
Cecil F. Powell
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
Image Taken From: http://www.nobelprize.org/nobel_prizes/physics/laureates/1950/powell-bio.html -
Murray Gell-Mann
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
Image Taken From: http://roohollah5329.blogfa.com/post-546.aspx -
Electron Cloud of Probability
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
