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Alchemists introduced the thought of breaking and creating matter. These ideas set up the inevitable creation of the periodic table.
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The ancient Greeks first thought of the atom, and how it is the smallest thing in the universe. They also believed that they are constantly in motion.
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He believed that everything was made up of atoms (indestructible). Furthermore, chemical reactions were the rearrangements of the atoms.
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She and Becquerel were awarded the Nobel prize for discovering radioactivity.
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He discovered the electron and made his own model of the atom: the plum pudding model.
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He invented the quantum theory of energy. He also invented the Planck's constant.
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Developed one of the earliest models of the atom.
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Discovered uranium fission with Otto Hahn and Fritz Strassmann.
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He discovered the nucleus by noticing that alpha rays would scatter when aimed at the center of an atom.
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Predicted the existence of bosons, which obeyed the quantum physics.
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He proved that electrons move in orbits around the nucleus. He also predicted that energy is released and transferred when they move from atom to atom.
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Proved that atoms could not only emit but absorb photons.
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His theory is that all matter has the characteristics of waves and particles.
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Was able to take the ideas of quantum physics and formulate them. This built a foundation for being able to solve problems.
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Discovered that two electrons cannot stay in the same quantum state at the same time (Pauli exclusion principle).
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Was able to use mathematics to predict the position of the electron in the atom. He made his own model: the quantum mechanic model.
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James changed the idea that all atoms were positively charged and he discovered neutrons.
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He developed the Valence Shell Electron Pair Repulsion (VSEPR) theory that is commonly used.
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Was able to use quantum mechanics to study further into the diatomic spectral analysis.
