Lecture_13_Electrons - LECTURE NOTES L ECTURE 13 W ave -...

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L E C T U R E N O T E S LECTURE 13 Wave-mechanical Model (11.2, 11.3, 11.5, & 11.6) GENERAL CHEMISTRY Fall 2009
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11.2 Energy and Light Properties of Light Light, which exists in tiny "packets" called photons , exhibits properties of both waves and particles . This property is referred to as the wave particle duality . A. Electromagnetic Radiation 1. Many types of EM waves a. visible light b. x-rays c. ultraviolet light d. infrared light e. radio waves 2. EM radiation are forms of energy which move through space as waves a. Move at speed of light (1). 3.00 x 10 8 m/s b. Speed is equal to the frequency times the wavelength c = νλ (1). Frequency is the number of waves passing a given point in one second ; designated by the Greek letter nu ( ν ). (2). Wavelength (lambda, λ ) is the distance between peaks of adjacent waves IMPORTANT: Different wavelengths of EM carry different amounts of energy. B. Light and Energy 1. Radiant energy is transferred in units (or quanta) of energy called photons a. A photon is a particle of energy having a rest mass of zero and carrying a quantum of energy. b.
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This note was uploaded on 01/30/2011 for the course CHEM 140 taught by Professor P during the Spring '10 term at University of Toronto- Toronto.

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Lecture_13_Electrons - LECTURE NOTES L ECTURE 13 W ave -...

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