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He proved that matter was neither gained nor lost during a chemical reaction using careful observations of the oxidatin of tin.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He proved the law of definite proportions.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He formed the atomic theory, which states that all matter is composed of tiny, indestructible particles called atoms that are all alike and have the same atomic weight.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
he discovered cathode rays had the following properties: travel in straight lines from the cathode, cause glass to fluoresce, impart a negative charge to objects they strike, are deflected by electric fields and magnets to suggest a negative charge, and cause pinwheels in their path to spin indicating they have mass.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He discovered the electron and developed the plum-pudding model of the atom.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
She discovered radium and polonium investigating radioactive substances.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He came up with the quantum theory.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He thought that light was made up of different particles that behaved like waves and particles. He also late developed the theory of relativity and the equation e=mc² which would be crucial to developing the atomic bomb that was dropped of Japn in WW2 and for the arms race betwwen the Soviet Union and the United States after WW2.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013.
"World War II." Wikipedia. Wikimedia Foundation, 11 Mar. 2013. Web. 03 Nov. 2013. -
He used the results of his gold-foil experiment to state that all the mass of an atom was in the nucleus at the center of the atom. He was also the first to split and atom and discover fission.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He stated that the electrons moved around the nucleus in orbits. He also presented the Bohr atomic model.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
"World War I." Wikipedia. Wikimedia Foundation, 11 Jan. 2013. Web. 03 Nov. 2013.
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"World War I." Wikipedia. Wikimedia Foundation, 11 Jan. 2013. Web. 03 Nov. 2013.
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He discovered that electrons had a dual nature-similar to both particles and waves. Particle/wave duality. Supported Einstein.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He viewed electrons as continuous clouds and introduced "wave mechanics" as a mathematical model of the atom.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
He discovered quantum tunnelling.
"Friedrich Hund." Wikipedia. Wikimedia Foundation, 11 Jan. 2013. Web. 03 Nov. 2013. -
He published the uncertainty principle.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
Using alpha particles he discovered the neuton a particle with a mass close to a proton.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013. -
"Adolf Hitler." Wikipedia. Wikimedia Foundation, 11 Jan. 2013. Web. 03 Nov. 2013.
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With the help of George Zweig, he brought forth the idea of "quarks", little bits of matter which when used kind of like building blocks, explain some complex chemical substances.
"Atom." Wikipedia. Wikimedia Foundation, 31 Oct. 2013. Web. 03 Nov. 2013.
