Chem 161-2010 Lecture 14 2404550556065751 2 3 4 5 6 7 8 9121314151617181920212223242526272829303132333435363740415051525354CHEM 161-2010 GRADES IN 2ndHOURLY EXAM ALL SECTIONSDouglass/CookRutgers/Pharm Avg of Tavss’ sections Avg of D/C sections Avg of Rutgers/Pharm sections: GRADES SECTIONS College Ave.
Chem 161-2010 Lecture 14 3PLAN FOR TODAY: H&P Sections 7.8 – 7.9 WAVE MECHANICS: MATTER AS WAVES • DE BROGLIE’S EQUATION • WAVE FUNCTIONS QUANTUM NUMBERS AND ATOMIC ORBITALS • QUANTUM NUMBERS • ELECTRON PROBABILITIES AND THE SHAPES OF ORBITALS • ELECTRON SPIN: A FOURTH QUANTUM NO.
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Chem 161-2010 Lecture 14 4CHAPTER 7LIGHT AND MATTERET: Describe light wave as electromagnetic radiation with a magnetic field, an electric field, and having a speed of 3 x 108m/s. Draw undulating light curve to define λ, υand amplitude. Relate light to graph on next page. ET: Discuss 3 equations from formula page and show that knowing one parameter gives the other two Wavelength = λ= distance/cycle = distance Frequency = υ= cycles/s = cycles s-1= s-1= Hz Amplitude = intensity, brightness, related to no. of photons emitted Ephoton= hυET: Use water waves to show relationship between high frequency and high energy; also use graph on next page. υ= c/λE = hc/λh = 6.626 x 10-34Js = 6.626 x 10-34kgm2s-2s = 6.626 x 10-34kgm2s-1c = 3 x 108m/s DeBroglie theorem: λ= h/mv ET: Wave-particle duality; tie into E = hυm is the mass in kg v = velocity in meters per second Bohr atom: ΔE = -B((1/nf2) - (1/ni2)) B = 2.179 x 10-18J Einstein’s photoelectric effect Total Energy = Energythreshold*+ EnergykineticEnergytotal= hυthreshold+ hυkinetic energy