set2 - Chem 6A Presentation #2 Overview Fundamentals B:...

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Chem 6A Presentation #2 2007-10-01 1 Overview Fundamentals B: Elements and atoms What are atoms? What was Dalton's atomic theory? What is the modern theory of the atom? What are isotopes? What information is contained in the periodic table? Chapter 1: Atoms: The Quantum World What are the characteristics of electromagnetic radiation? Can radiation be described as waves?
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2 What are the chemical components of matter? Substance: either an element or a compound Element : a substance consisting of one type of atom macroscopic properties derive from type of atom properties of each element are unique Compound : 2 or more elements bonded together elements in compound are present in fixed parts by mass Mixture : contains substances that are physically intermingled composition not fixed components can be separated by physical change
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3 What observations led to an atomic view of matter? Mass conservation : Matter is neither created nor destroyed Definite composition (or constant composition) : Any compound, no matter what its source, is composed of the same elements in the same parts (or fractions) by
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This note was uploaded on 09/04/2008 for the course CHEM 234234234 taught by Professor Johnson during the Spring '08 term at UCSD.

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set2 - Chem 6A Presentation #2 Overview Fundamentals B:...

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