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Related Flashcards
Cards In This Set
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Dalton's Atomic Theory
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All atoms are neither created nor destroyed. His theory of atoms was that they are solid matter.
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Who found the electron?
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Thompson.
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Who found the neutron?
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Sir James Chadwick
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Who did the oil drop experiment?
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Milikan
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Who discovered the nucleus?
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Ernest Rutherford
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What is the nucleus composed of?
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Protons & neutrons
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Protons
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+1 charged particle, AMU: 1, located in nucleus
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Neutrons
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0 charge, Mass: equal to proton (AMU: 1), located in nucleus
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Electrons
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-1 charge, AMU: 1/1840, located outside nucleus
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What are the fundamental building blocks of all atoms?
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Electrons, protons & neutrons
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Atomic Number
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Same as the # of protons in nucleus of the atom of that element, atomic # also increases left to right on periodic table.
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Mass Number
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Total # of protons & neutrons in the nucleus
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Isotopes
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Atoms that have same # of protons but different numbers of neutrons
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Atomic Mass
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Weighted averages of the masses of the isotopes of that element
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Atomic Mass Unit (AMU)
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Unit of Comparison
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