Periodic Properties of the Elements

Periodic Properties of the Elements - Periodic Properties...

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Periodic Properties of the Elements Development of the Periodic Table The most significant tool for organizing and remembering chemical facts is the periodic table Based on the periodic nature of electron configurations Elements in the same column have the same number of valence electrons Similarities in chemical nature due to similarities in valence electron configuration Development of the Periodic Table Certain elements, such as gold and silver, can be found naturally in their elemental form and were discovered thousands of years ago. Some radioactive elements are quite unstable and their isolation is dependent upon modern technology The majority of elements are stable, but commonly present in compound form with other elements In the 1800's methods were developed to isolate various elements from compound form 1800: 31 elements identified 1865: 63 elements identified 1869: Dmitri Mendeleev and Lothar Meyer published schemes for classifying elements The elements could be ordered according to their atomic weight (i.e. grams/mole for
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Periodic Properties of the Elements - Periodic Properties...

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