L07 - Successes of the Bohr model Niels Bohr (1885-1962)...

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Unformatted text preview: Successes of the Bohr model Niels Bohr (1885-1962) The electron in the hydrogen atom can have only certain discrete values of energy. Energy of the electron in the hydrogen atom is quantized . E n = 13.6 eV 1 n 2 Wave-Particle Duality of Matter Louis de Broglie (1892-1987) h mu de Broglie reasoned that if light has particle-like properties, ``normal matter should also have wave-like properties. de Broglie derived an equation for the wavelength of material particles moving at constant speed: m is the mass of the particle and u is the speed. Table 7.1 The de Broglie Wavelengths of Several Objects Substance Mass (g) Speed (m/s) (m) slow electron fast electron alpha particle one-gram mass baseball Earth 9x10-28 9x10-28 6.6x10-24 1.0 142 6.0x10 27 1.0 5.9x10 6 1.5x10 7 0.01 25.0 3.0x10 4 7x10-4 1x10-10 7x10-15 7x10-29 2x10-34 4x10-63 h mu Wave motion in restricted systems:...
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L07 - Successes of the Bohr model Niels Bohr (1885-1962)...

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