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In 400 BC Democritus formulated the Atomic Theory for the universe. He had the idea that there had to be a smallest unit of matter.
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Helped develop the modern atomic formula. He performed many experiments with chemicles and found out that matter consists of lumpy masses.
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Thompson discovered the electron. He aslo propoesd the Rasin in the Pudding model.
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Published the famous equation E=MC2
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He conducted experiments to see the inside of the atom.
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He did many experiments to find out the mass of 1 electron.
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Niels Bohr developed the Bohr model. It is a modle of an atom with a nucleus in the middle and electrons in orbit around it.
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He helped contribute to the Quantum Formula by postulating the wave nature of electrons and he suggested that all matter has wavelike properties.
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Predicted that an electron spins when it orbits the nucleus. Made a rule governing the behavior of electrons within the atom that followed the experiment.
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He created quantum mechanics and made important contributions to the theories of the atomic nucleus and subatomic particles. Behavior of atoms are based on mathematical quantities. Indetermency.
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He developed an Atom wave model.
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He discovered the subatomic particle neutron,
