lecture2

2696 g cl1 g fe 19044 4406 g fe 3443 g fe 19044 15

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Unformatted text preview: = = 1.2696 g Cl/1 g Fe = = 1.9044 44.06 g Fe 34.43 g Fe 1.9044 1.5 3 ratio of masses = = = 1.2696 1 2 water, 11.11% H, 88.89% O 88.89 g O g O/1 g H = = 8.00 11.11 g H 16.000 2 ratio of masses = = 8.00 1 and hydrogen peroxide, 5.88% H, 94.12%O 94.12 g O g O/1 g H = = 16.00 5.88 g H 2.3 Dalton's Atomic Theory (1808) 1. Elements are made up of indivisible particles called atoms. 2. Atoms of the same element are identical, and atoms of different elements are different. 3. Atoms combine to form compounds in fixed integer ratios. 4. In chemical reactions, the atoms do not change. Dalton created the first table of atomic weights, based on the relative amounts of one element that combined with another. H was assigned a value of 1 2-1 Chapter 2 Atoms, Molecules, and Ions 2.4 Early Experiments to Characterize the Atom negative cathode positive anode J.J. Thompson 1898-1903 - discovers electron cathode ray tube. 8 Determined e/m = -1.76 x 10 coulomb/g -19 Robert Millikan 1909 - oil drop experiment determined e = -1.60 x 1...
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This note was uploaded on 04/05/2014 for the course CHEM 1211 taught by Professor Jackduff during the Spring '13 term at SPSU.

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