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Discovered that atoms are small and invisiable to the human eye.
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He established the law of conservation of mass . He founded a list of elements too.
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He found the composition of salt. He discovered that it always contained the same weight ratios.
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He ombined atom A with atom B and he also set atomic weights.
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He published the perodic table as Princples of Chemistry with 63 elements.
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Discovered cahode ays could produce sharp shadows.
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She discovered new radioactive elements.
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He theorized the cathode rays.
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Discovered radioativity scale. He also discovered the protron and nucular physics.
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Oil drop experiment. Measured electron charges.
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Discovered the Planetary model. Atom is illistrated in the adjacent igure.
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Measured wavelegnths , positioning of elements on the periodic table.
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Discovered the Neutron.
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Provided theoritical basis for Niels Bohr. He also discovered the movement of an electron in an atom.
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Explained and named nuclear fision. Using Bohr's liquid drop.