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In matter the atoms are indestructible units which means that they are stable and they do not break apart. The atoms do not change form and move around to combine different form of a molecule. He also made up a term called, Atomos. Atomos matter can be cut until it can not be cut anymore.
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Introduced the metric system, Introduced the identification of hydrogen and oxygen
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Established in 1789 by a french scientist by the name of Antoine Lavioser. States that mass is neither created or destroyed.
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He proposed the Law of Multiple Proportions. This law led directly to the proposal of hte Atomic Theory in 1803.
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He developed the concept of the mole and proposed a system of symbols to represent atoms of different elements. He recognized the existence of atoms of elements and that compounds formed from the union of these atoms. He therefore assumed that simplest ratios would be used in nature and came up with a formula for water. He then assigned a relative atomic weight of one to hydrogen and developed a relative atomic weight scale from percent composition data and assumed atomic ratios.
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Credited as being the creator of the first periodic table of elements.
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vaccum tube containg one or maore electron guns and a florescent screen used to view images
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Credited for finding the first ecidence for isotopes of a stable element in 1913.
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An atom model that was proposed by JJ thompson, the physist who discovered the electron.
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Earliest succes was the accurate determination of the charge carried by an electron
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A model of the atom devised by ernist rutherford
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His law advanced atomic physics by providing the first expirimental evidencein favor of Neils theory
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Made contributions to the understanding of the atomic structure and quantum theory
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Expiriment to prove the structure of the atom.
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Developed a number of fundamental results in the field of the quantum theory, which formed the basis for mechanics.
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Discovered the concept of radioactive half-life, proved that radioactivity involved the transmulation of one chemical element to another
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was awarded the noble prize in physics for his discovery of the neutron
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An atom model where electrons are no longer depicted as particles moving around the nucleus as a fixed orbit.
