Ch06 Powerpoint

Ch06 Powerpoint - Understanding Periodic Trends Trends...

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Understanding Periodic Understanding Periodic Trends Trends CHAPTER 6 CHAPTER 6
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Timeline 1829 J.W. Dobereiner Classification system in which elements are grouped in triads 3 elements with similar chemical properties Didn’t work for all of the elements 1869-Russian Chemist, Dmitri Mendeleev: Designed a Periodic Table 1869 Elements are listed in order of increasing atomic mass
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Timeline continued 1913-British Scientist, Henry Moseley: Designed the Modern Periodic Table Elements are listed in order of increasing atomic # Based on Periodic Law: physical & chemical properties of elements are periodic functions of their atomic #s
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PERIODICITY There are general trends in the properties of atoms and their ions. These trends can be explained using the periodic table and the electron configurations of the atoms.
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Atomic Radii D I atom Half the distance between the nuclei in a molecule consisting of identical atoms Increases as you move down a group e - s are added to higher energy levels
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This note was uploaded on 11/21/2011 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

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Ch06 Powerpoint - Understanding Periodic Trends Trends...

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