ch30 - Chapter 30 The Nature of the Atom 30.1 Rutherford...

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Chapter 30 The Nature of the Atom
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30.1 Rutherford Scattering and the Nuclear Atom In its natural state, an atom is electrically neutral.
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30.1 Rutherford Scattering and the Nuclear Atom A Rutherford scattering experiment.
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30.1 Rutherford Scattering and the Nuclear Atom Conceptual Example 1 Atoms are Mostly Empty Space In the planetary model of the atom, the nucleus (radius = 10 -15 m) is analogous to the sun (radius = 7x10 8 m). Electrons orbit (radius = 10 -10 m) the nucleus like the earth orbits (radius = 1.5x10 11 m) the sun. If the dimensions of the solar system had the same proportions as those of the atom, would the earth be closer to or farther away from the sun than it actually is?
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30.2 Line Spectra The individual wavelengths emitted by two gases and the continuous spectrum of the sun.
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30.2 Line Spectra The Line Spectrum of Hydrogen Lyman series Balmer series Paschen series , 4 , 3 , 2 1 1 1 1 2 2 = - = n n R λ , 5 , 4 , 3 1 2 1 1 2 2 = - = n n R λ , 6 , 5 , 4 1 3 1 1 2 2 = - = n n R λ
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30.3 The Bohr Model of the Hydrogen Atom In the Bohr model, a photon is emitted when the electron drops from a larger, higher-energy orbit to a smaller, lower energy orbit. hf E E f i = -
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30.3 The Bohr Model of the Hydrogen Atom THE ENERGIES AND RADII OF THE BOHR ORBITS r kZe r kZe mv E 2 EPE KE 2 2 2 2 1 - = - = + =
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30.3 The Bohr Model of the Hydrogen Atom , 3 , 2 , 1 2 = = = n h n r mv L n n n π , 3 , 2 , 1 4 2 2 2 2 =
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