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Chapter 8 Atoms and Periodic Properties
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Fig. 8.1 Computer generated model of a beryllium atom p n
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Fig. 8.2 A cathode ray tube
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Fig. 8.3 A cathode ray tube used to discover the electron J.J. Thomson (1897)
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Fig. 8.4 The oil-drop experiment to determine the charge on an electron Robert Millikan (1906)
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Fig. 8.5 The gold foil experiment to determine the size of the nucleus Ernest Rutherford (1907)
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Fig. 8.6 Alpha particles moving through gold foil
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The size of the nucleus vs the size of the atom
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Fig. 8.7 The three isotopes of hydrogen
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Fig. 8.8 How atomic spectra are formed
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Fig. 8.9 The line spectra emitted from hydrogen
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Fig. 8.10 When an electron makes a “quantum leap” down, it emits a photon of specific energy E photon = hf
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Fig. 8.11 Some energy levels of the hydrogen atom
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Fig. 8.12 Fluorescent lamps contain mercury atoms
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