atomic arrangements
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In this introductory lecture, Professor Sylvia Ceyer introduces those throughout history who have contributed to the atomic theory of matter, beginning with Aristotle and Democritus, and ending with the work of Lavoisier, Proust, and Dalton. After disussing scanning tunnelling microscopy, Professor Ceyer moves to the major advances in chemistry at the end of the 19th century. These include Newtonian mechanics, thermodynamices, statistical...more
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Taking off from a 2007 Gresham lecture "Stealing the Silver: How We Take From The Dispossessed, The Poor and Our Own Children", Michael intends to further explore equitable inter-generational economics. Starting with natural resources and long-lived infrastructure projects, then moving on to savings, business and fashion, we see a variety of commercial arrangements. But which ones are long-lasting? Which arrangements are fair to futu...more
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This lecture begins by applying the united-atom "plum-pudding" view of molecular orbitals, introduced in the previous lecture, to more complex molecules. It then introduces the more utilitarian concept of localized pairwise bonding between atoms. Formulating an atom-pair molecular orbital as the sum of atomic orbitals creates an electron difference density through the cross product that enters upon squaring a sum. This "overlap" term is th...more
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This lecture traces the development of elemental analysis as a technique for the determination of the composition of organic compounds beginning with Lavoisier's early combustion and fermentation experiments, which showed a new, if naïve, attitude toward handling experimental data. Dalton's atomic theory was consistent with the empirical laws of definite, equivalent, and multiple proportions. The basis of our current notation and of precis...more
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After discussing the classic determination of the heat of atomization of graphite by Chupka and Inghram, the values of bond dissociation energies, and the utility of average bond energies, the lecture focuses on understanding equilibrium and rate processes through statistical mechanics. The Boltzmann factor favors minimal energy in order to provide the largest number of different arrangements of "bits" of energy. The slippery concept of di...more
