CH7(2-3)Oct24FA07a

CH7(2-3)Oct24FA07a - CHEM 109 General Chemistry University...

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Unformatted text preview: CHEM 109 General Chemistry University of Nebraska Fall 2008 Confounding data in the relationship between matter and light Three phenomena involving matter and light were especially confounding to scientists in the early 20 th century. 1. _______________________ 2. _______________________ 3. _______________________ An explanation of these three phenomena required a radically new way to picture energy. __________ The wave model of light cannot explain some aspects of the behavior of light... The Particle Nature of Light n is a positive integer called a quantum number h is Plancks constant ( h = ________________) Nobel Prize in physics 1918 1000 K 1500 K 2000 K 1. The emission of light from hot objects _________________ Max Planck (1858-1947) said, energy is __________ A hot, glowing object can only emit or absorb certain quantities of energy. Plancks Quantum Theory: if an atom can emit (or absorb) only certain quantities of energy, the atom itself must have only certain quantities of energy the atom is said to be quantized it exists only in certain fixed quantities of energy rather than being continuous a packet of energy is a ________ (plural = quanta) and has an energy equal to h The smallest energy change for an atom in a given energy state: __________ (n = 1) An atom changes its energy state by emitting (or absorbing) one or more quanta of energy The Particle Nature of Light The wave model of light cannot explain some aspects of the behavior of light......
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CH7(2-3)Oct24FA07a - CHEM 109 General Chemistry University...

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