120_lecture_2

120_lecture_2 - CHEM 120 Highland Community College Unit 2...

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CHEM 120 Highland Community College Unit 2 John Sullivan Fall, 2007
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Unit 2--Intro Atomic Theory of Matter Subatomic Particles—how many and where are they.
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Atomic Theory of Matter All matter is composed of atoms. The atoms of a given element differ from the atoms of all other elements. Chemical compounds consist of atoms combined in specific ratios. Chemical reactions change the way the atoms are combined.
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Richard Feynman (1918-1988) If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words?
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Feynman’s Response I believe it is the atomic hypothesis, that all things are made of atoms -- little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another.
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Subatomic Particles
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Appears in the periodic table. Always equal to the number of protons in
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This note was uploaded on 11/06/2010 for the course CHEM 120 taught by Professor Sullivan during the Spring '10 term at Highland CC.

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120_lecture_2 - CHEM 120 Highland Community College Unit 2...

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