Transcription of Chapter 7 Notes - Atomic Structure and Periodicity
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Chapter 7 Notes - Atomic Structure and Periodicity
AP Chemistry A. Allan Chapter 7 Notes - Atomic Structure and Periodicity Electromagnetic Radiation A. Types of EM Radiation (wavelengths in meters) 10-12 10-10 10-8 4 to 7x10-7 10-4 10-2 1 102 104 Wavelength increases Frequency decreases energy decreases Speed is constant = x 108 m/sec B. Properties of EM Waves 1. Wavelength ( ) a. Distance between two consecutive peaks or troughs in a wave b. Measured in meters (SI system) 2. Frequency ( ) a. Number of waves that pass a given point per second b. Measured in hertz (sec-1) 3. Speed ( c ) a. Measured in meters/sec 4. Relationship of properties a. c= gamma xrays UV visible IR micro Radio waves FM short AM The Nature of Matter A. Max Planck and Quantum Theory 1.
7.2 The Nature of Matter . A. Max Planck and Quantum Theory 1. Energy is gained or lost in whole number multiples of the quantity hv Frequency = v Planck's constant = h = 6.626 x 10-34 J•S ∆E =nhv 2.
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