Atomic Structure

Atomic Structure - Atomic H Spectrum Heisenberg Uncertainty...

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Unformatted text preview: Atomic H Spectrum Heisenberg Uncertainty Electron Configuration Electron Affinity Ionization Energy Electronegativity Size Applications Quantum Numb ers Energy Levels Quantum Mechani cs Quantization Bohr Model Wave/Particle Concept Atomic Structure All waves have a characteristic wavelength, , and amplitude, A . Frequency, , of a wave is the number of cycles which pass a point in one second. Speed of a wave, c, is given by its frequency multiplied by its wavelength: The Wave Nature of Light The Wave Nature of Light = c The Wave Nature of Light The Wave Nature of Light The Wave Nature of Light The Wave Nature of Light The Wave Nature of Light The Wave Nature of Light Planck : energy can only be absorbed or released from atoms in certain amounts called quanta . The relationship between energy and frequency is Quantized Energy and Photons Quantized Energy and Photons = h E The Photoelectric Effect and Photons Einstein assumed that light traveled in energy packets called photons . The energy of one photon is: Quantized Energy and Photons Quantized Energy and Photons = h E Nature of Waves: Quantized Energy and Photons Nature of Waves: Quantized Energy and Photons Line Spectra Radiation composed of only one wavelength is called monochromatic. Radiation that spans a whole array of different wavelengths is called continuous. White light can be separated into a continuous spectrum of colors. Note that there are no dark spots on the continuous spectrum that would correspond to different lines. Line Spectra and the Bohr Model Line Spectra and the Bohr Model Bohr Model Colors from excited gases arise because electrons move between energy states in the atom. (Electronic Transition) Line Spectra and the Bohr Model Line Spectra and the Bohr Model Bohr Model Since the energy states are quantized, the light emitted from excited atoms must be quantized and appear as line spectra. After lots of math, Bohr showed that where n is the principal quantum number (i.e., n = 1, 2, 3, and nothing else)....
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This note was uploaded on 04/26/2008 for the course CHEM 212 taught by Professor Ng during the Fall '07 term at Winona.

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Atomic Structure - Atomic H Spectrum Heisenberg Uncertainty...

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