Chapter 4

Chapter 4 - Chapter 4 Periodic Trends of the Elements 2011...

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©2011 Donald L. Siegel All Rights Reserved Chapter 4 Chapter 4 Periodic Trends of the Elements
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©2011 Donald L. Siegel All Rights Reserved Origins of the Periodic Table Origins of the Periodic Table W Based on predictions Early patterns noticed (rule of octaves) Patterns weren’t exact Mendeleev notices an aparant “hole” in the table Predictions: AW: 68u, mp low, density 5.9g/cm Predictions: AW: 68u, mp low, density 5.9g/cm 3 , E , E 2 O 3 Discovered Discovered Ga Ga : 69.9u, 30.2 : 69.9u, 30.2 °C, 5.94g/cm C, 5.94g/cm 3 , Ga , Ga 2 O 3 Other predictions, including that some elements were “out of order” W Modern Table based on Ground States of electrons
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©2011 Donald L. Siegel All Rights Reserved Electronic configuration and Electronic configuration and the Periodic Table the Periodic Table
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©2011 Donald L. Siegel All Rights Reserved Periodic Properties Periodic Properties W Many other properties are strongly on the effective nuclear charge and the distance of the valence electrons from the nucleus Effective nuclear charge increases from left to right across each period Distance increases from top to bottom
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©2011 Donald L. Siegel All Rights Reserved Atomic radius Atomic radius W The stronger the attraction of the valence electrons to the nucleus, the smaller the
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This note was uploaded on 02/20/2012 for the course 160 161 taught by Professor Kim during the Fall '08 term at Rutgers.

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Chapter 4 - Chapter 4 Periodic Trends of the Elements 2011...

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