Presentation2(sept6)

Presentation2(sept6) - CHEM 1007 September 6 1.Chemical...

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CHEM 1007 – September 6 1.Chemical Reactions 2.Periodic Table 3.Predictions From Periodic Table 4.Light (wavelength, frequency,
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Chemical Reactions A process where one set of substances (reactants) is converted to a different set of substances (products). 3NO 2 (g) + H 2 O ( l ) 2HNO 3 (aq) + NO (g)
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Balancing Reactions Elements in products = elements in reactants Only change stoichiometric coefficients Suggested method 1. If an element occurs in only one compound on each side, try balancing that element first. 2. If an element occurs on one side as a free element, balance that element last. 3. Leave polyatomic ions together and balance them as a unit. 4. Check to make sure each element is balanced.
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Periodic Table First suggested by Dmitri Mendeleev (1869) Rows called periods Elements in the same column have similar properties. Columns called group or family Major Groups and Families to Know Metals, Nonmetals, Metaloids/Semimetals (fig 3.15) Main Group, Transition Metals, Inner Transition Metals (fig 3.19)
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This document was uploaded on 10/26/2011 for the course CHEM 1007 at Cornell.

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Presentation2(sept6) - CHEM 1007 September 6 1.Chemical...

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