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He believed that everything in the universe was made up of atoms.
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Developed a crude method for measuring the masses of the elements in a compound. Dalton's Atomic Theory: All elements are composed of atoms. Atoms of the same element are identical.
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He was the one who discovered the periodic table.
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He discovered protons with the experiments he did with cathode rays
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He was the first person to discover an electron. He used a cathode ray tube.
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Best known as the originator of the quantum theory of energy
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Discovered the elementary change of an electron using the oil-drop experiment
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He was the first person to discover the nucleus. The nucleus is small, the nucleus is dense, the nucleus is positively charged
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Niels Bohr proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities.
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Used mathematical equations to describe the likelihood of finding an electron in a certain position.
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He was the first person to discover the neutron by comparing electric charges and masses of different atoms. The neutron is found in the nucleus with the proton.
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Was known for his uncertainty principle and theory of quantum mechanics.
