10-31-11 - Chemistry 1A F11 10.31.11 Dr Shaka Population...

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187 Chemistry 1A F11 10.31.11 Dr. Shaka Course Code 40000 • Population has nearly tripled from 1950 to now. Population Growth • Each evening, 219,000 new people turn up for dinner! npg.org
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188 Chemistry 1A F11 10.31.11 Dr. Shaka Course Code 40000 • The Haber process requires a lot of muscle. Food Production One out of two nitrogen atoms in your body came directly from this power-intensive process. Adapted from Wikipedia.org
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189 Chemistry 1A F11 10.31.11 Dr. Shaka Course Code 40000 • There are Limits to Growth (Dennis Meadows, 1972). Resource Trajectories
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190 Chemistry 1A F11 10.31.11 Dr. Shaka Course Code 40000 Review Problems • An atom has an electron in an orbital denoted 4 d . (a) How many angular nodes does the orbital have? (b) How many radial nodes does the orbital have? Ans. The total number of nodes is n 1 where n is the principal quantum number: no nodes for 1, one node for 2, etc. so the total number of nodes is 3 . A d-orbital has two angular nodes (s has zero, p has one. ..). Therefore a 4d orbital has one radial node .
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191 Chemistry 1A F11 10.31.11 Dr. Shaka Course Code 40000 Review Problems • An electron has a speed of 10 kilometers per second. What is its de Broglie wavelength? Ans. The de Broglie wavelength is related to
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10-31-11 - Chemistry 1A F11 10.31.11 Dr Shaka Population...

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