Ephoton = hv = ΔE atomc = λvE= hc/λh is Planck’s Constant (6.626x10^-34j/s)The Problem with the Model of the Atom with Classical Physics:Why don’t electrons collapse into the nucleus?Problems with Rutherford’s ModelThe kinetic energy of an electron must counterbalance the potential energy of attraction to the nucleusClassical physics says a negative particle moving in a curved path around a positive particle must emit radiation and lose energyThe frequency of the emitted radiation should change smoothly as the negative particle spirals inwardThe atom should collapse!Calculating the Wavelength of Spectral LinesRydberg Equation 1/λ = R((1/n1^2) – (1/n2^2))R is the Rydberg Constant = 1.096776x10^7m^-1Emission Transitions of HydrogenTransitions from a higher energy level to n=2 are in the visible rangeCHEM 111 1nd Edition Lecture 8 Outline of Last Lecture I. Electromagnetic Spectrum and RadiationII. Atomic SpectraIII. Quantized Statesa. Particles vs. WavesIV. Quantum TheoryV. Photoelectric EffectOutline of Current Lecture II. Problems with Rutherford’s ModelIII. Calculating the Wavelength of Spectral Lines IV. Emission Transitions of HydrogenCurrent LectureThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Ephoton = hv = ΔE atom c = λv E= hc/λ h is Planck’s Constant (6.626x10^-34j/s) The Problem with the Model of the Atom with Classical Physics: Why don’t electrons collapse into the nucleus? Problems with Rutherford’s Model- The kinetic energy of an electron must counterbalance the potentialenergy of attraction to the nucleus - Classical physics says a negative particle moving in a curved path around a positive particle must emit radiation and lose energy- The frequency of the emitted radiation should change smoothly as the negative particle spirals inward- The atom should collapse! Calculating the Wavelength of Spectral Lines- Rydberg Equation 1/λ = R((1/n1^2) – (1/n2^2))- R is the Rydberg Constant = 1.096776x10^7m^-1 Emission Transitions of Hydrogen- Transitions from a higher energy level to n=2 are in the visible
View Full Document
Unlocking...