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| Amount of energy emitted or absorbed by an object is restricted to "pieces" called quanta. The equation that he used was E=hv |
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| Used the equation E=hv to explain the photoelectric effect. |
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| Determined that a photon behaves like a particle. |
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| Determined that particles of matter behave like waves. |
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| Proposed the Uncertainity Principle, which states that tje position and momentum of a moving object cannont simultaneously be measured and known. |
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| Proposed that to get spectral lines, the energy of the election in the atom must be quantized. He studied the hydrogen atom spectrum. |
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| Electrons are added on at a time to the lowest energy orbitlas available until all the electrons of the atom have been accounted for. |
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| Pauli Exclusion Principle |
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| An orbital can hold a maximum of 2 electrons. Two electrons in the same orbital must have opposite spins. |
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| Electrons occupy equal-enery so that a maximum number of unpaired electrons results.(a.k.a. the Bus Rule) |
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