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Democritus found the atom. all atoms are invisible, atom derives from atomos. Atomos is greek for invisible.
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Law of Conservation of Mass, discovered mass and that it is the same in different forms. He also helped develop the metric system.
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Established by french chemist Antoine Lavoisier, states that mass is neither created or destroyed in any ordianary chemical reaction.
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He proposed atomic theory, with spherical solid masses in motion. Atoms can't be made or destroyed.
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Created first periodic table. Later won a noble peace prize for it.
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He descovered the electron, he described atoms as ball or positive charge containing a number of electrons.
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Credited with measuring the charge of an electron and the oil drop experiment.
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Karl Ferdinand Brain invents Cathode Raytube, forerner for radar and ratio tubes.
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Electrons surround positive charge.
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Conducted gold foil experiment; atoms are mainly open space with small hard nucleas in center.
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Modern day model of an electron cloud.
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Credited with "Bohr Planetary Model" and theory that electrons travel in specific planes.
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Sorted elements based off of their atomic number instead of atomic mass.
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Modern day model of an atom.
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credited with mathmatically showing where electrons are in an atom.
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Is credited with the discovery of the neutron.