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20 Cards in this Set
- Front
- Back
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Carbon-12 and Carbon-13 are examples of _______.
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isotopes
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Which scientist did not have evidence to support the idea of the atom?
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Democritus
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Which law states that elements always combine in ratios of small, whole numbers?
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Law of Multiple Proportions
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True or false: All of Dalton's statements about atoms have been proven to be false.
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false
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J.J. Thompson is credited with discovering what subatomic particle?
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electron
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What device did J.J. Thompson use to make his discovery?
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cathode-ray tube
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The Oil Drop Experiment contributed what piece of information to atomic theory?
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mass of an electron
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What charge do atoms have?
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neutral
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Who conducted the Gold Foil Experiment?
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Rutherford
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Rutherford discovered what part of the atom?
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nucleus
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What is the charge of an atom?
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positive
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Bohr modeled his atom after what?
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solar system
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What change did Bohr make to the model of the atom?
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energy levels
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What is the charge, symbol and location of the electron?
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negative, e-, outside nucleus
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What is the charge, symbol, and location of a proton?
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positive, p+, nucleus
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What is the charge, symbol, and location of a neutron?
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neutral, n, nucear
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Where is the mass of atom located?
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nucleus
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Where is the volume of atom located?
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outside nucleus (electron cloud)
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Why do models of the atom keep changing?
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better technology leads to better data so the model needs to keep getting updated
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What does Dalton's model of the atom resemble?
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a solid sphere
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