Scientists Ch. 3

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Scientists Ch. 3
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Objectives

• SWBAT review knowledge of scientists.

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• Who used the oil-drop experiment and what did it
  prove?
• Robert Millikan-the charge to mass ratio of the
  electron

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• What did the Gold-foil experiment show?
• That the nucleus of the atom is very small and
  positively charged.

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• Who came up with four postulates of atomic
  theory, including atoms are the smallest,
  indivisible part of an element?
• John Dalton

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• Who came up with the Plum Pudding model?
• J.J. Thompson

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• What did Henri Becquerel study?
• Radioactivity of uranium

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• What did the cathode ray tube experiment prove?
• Electrons are negatively charged

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• What did Benjamin Franklin study?
• Static electricity

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• Who discovered that atoms contain particles that
  have electrical charge?
• Michael Faraday

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• Who discovered atomic number?
• Henry Moseley

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• What Law did Antoine Lavosier come up with?
• The law of conservation of matter

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• What law did Joseph Proust come up with and what
  does it mean?
• The law of constant composition-a compound always
  contains the same whole number ratio of elements
  by mass.

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• Who performed the gold-foil alpha scattering
  experiment?
• Ernest Rutherford

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• Who used cathode ray tubes to study electrons?
• J.J. Thompson