CH100_F09_C11_Atomic_Theory - Chapter 11 Atomic Theory...

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Chapter 11 Atomic Theory Problems 5,7,17,19,23,31,39,41,43,45,47,49,51,53 11.1 Electromagnetic Radiation Electromagnetic (EM) radiation consists of energy particles which move as a wave at the speed of light. EM radiation consists of radio waves, microwaves, infrared, visible, UV, X-rays, and gamma-rays. Light from an incandescent light bulb produces a continuous spectrum of IR and visible light. 11.1 Electromagnetic Radiation - 2 When an element is heated, it emits light at specific frequencies (not continuous). How can this be explained? The Atomic Spectra of Some Elements 11.2,3 The Atom The electrons in atoms may have different energies. However, each electron in an atom can have only a specific, or quantized , energy. Electron energies are related to their principal quantum number, n . The larger n, the higher the electron energy. Electrons in lower energy levels are closer to the nucleus.
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The lines in the atomic spectra arise from an electron moving between energy levels 11.2,3 The Atom – 2 For every principal energy level (n), there are n sublevels. The sublevels are designated by the letters s, p, d, and f.
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CH100_F09_C11_Atomic_Theory - Chapter 11 Atomic Theory...

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