CHEM103 Lecture Notes - Lecture 3: Uncertainty Principle, Molecular Electronic Transition, Emission Spectrum
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Chem 103 lecture 3 bohr"s model//the wave particle duality of matter and energy//quantum mechanics and the hydrogen atom. H atom is the simplest atom, it has 1e-, 1p+ and no neutrons. There were 2 issues with the rutherford model: atom is unstable according to classical physics, failed to explain the observation of line spectra. Bohr"s model blends classical and quantum theory: the electron occupies only certain energy levels and these are called stationary states. (cid:3041)= (cid:3027)2(cid:3041)2. Where: rh = rydberg"s constant for h atom = 2. 179 * 10-18 j. Energy scale n=1, e1 = (cid:3027)2(cid:3041)2 = rh = 2. 179 * 10-18 j n=2, e2 = - 5. 448 * 10-19 j n=3, e3 = - 2. 421 * 10-19 j n= , e = 0 j. In absorption, nf > ni e = positive. Problem: what is the frequency and the wavelength of the transition between ni = 5 and nf = 2 for hydrogen.