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Developed the idea of the atom.
(460 b.c.) -
He came up with the Law of Conservation of Mass. He also stated that oxygen was indeed an element.
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Developed 'Daltons Atomic Theory'
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- All matter is made of atoms. Atoms are invisible and indistructable.
- All atoms of a given element are identical in mass and properties.
- Compounds are formed by combinations of 2 or different kinds of atoms.
- A chemical reaction is a rearrangement of atoms.
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In 1869 he discovered 63 elements and created the Periodic Table to organize them.
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Discovered the electron
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Created by Karl Braun in 1897.
Its a special, electronic vacuum tube that uses a focused electron beam to display images. -
He expanded Rutherfords atomic theory by proposing that electrons travel only in certian successfuly larger orbits,
( Invented the Bohr Planetary Model) -
Created by J.J Thomson in 1904, it suggested that the positive fluid in an atom held the negative charges, the electrons, in the atom because of electrical forces.
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The Gold Foil Experiment
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He created the oil drop expirement to determine the chage of an electron.
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Created by Ernest Rutherford in 1911.
It discovered that the atom has a central nucleus surrounded by orbiting electrons. -
He discovered isotopes and improved the periodic table.
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Proposed by Niels Bohr in 1915. It suggested that the nuetrons and protons orbit the nucleus.
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Created by Antoine Lavoisier. States that in a chemical reaction, the mass of the products equals the mass of the reactants.
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He was the first to establish the theory of the nuclear atom. He constructed the Gold Foil Experiment a,k,a the Rutherford Model.
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Created by Erwin Schrodinger in the 1920s. In this model it states that the elctrons do not have a specific spot in the arom. They are anywhere around the nucleus.
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He developed a powerful model of the atom.
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Created by Erwin Schrodinger. It correctly defines the electrons movement with relation to the nucleus.
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He determined that the nuetron did exist.
