Tuesday, December 1, 2009

The Periodic Table


The periodic table was created by Dmitry Mendeleev in 1869. He was also know as Dmitri Ivanovich Mendeleyev, Dmitrii Ivanovich Mendeleev, Dmitry Ivanovich Mendeleev, Dmitri Ivanovich Mendeleev, and Dmitry Mendeleev. He came up with the periodic table and above is a picture that shows a reprint of the original one. He arranged these elements by atomic weight. Below is the current periodic table today, which many of us have seen in our current Chemistry class. Many new elements have been discovered and there is more information about the earlier ones as well. This was one of the great scientific advancements of the 19th century because it enabled them to organize the elements and then research and discover more about them and even discover new ones. It is obviously a very effective way since we are still using it in the 21st century, two centuries later.


Citations:

Vucinich, Alexander. Mendeleyev, Dmitry Ivanovich. http://galenet.galegroup.com/servlet/History/hits?docNum=K3404100815&tab=32&locID=menlo_schlib&origSearch=false&hdb=MW&t=RK&s=1&r=d&items

=0&secondary=true&o=&sortOrder=RE&n=10&l=dB&sgPhrase=true&c=1&tabMap=114&bucket=bio&SU= periodic+table (accessed December 01, 2009)

Pictures from:

http://galenet.galegroup.com/servlet/History/hits?docNum=CD2210013968&tab=16&locID=menlo_schlib&origSearch=false&hdb=MW&t=RK&s=1&r=d&

items=0&secondary=true&o=&sortOrder=RE&n=10&l=dI&sgPhrase=true&c=1&tabMap=114&bucket=

img&SU=periodic+table

http://www.bpc.edu/mathscience/chemistry/images/periodic_table_of_elements.jpg


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1 comment:

  1. MeganDecember 2, 2009 at 3:40 PM

     Began by organizing the elements by atomic weight and realized that they would go from a halogen to an alkali metal to an alkaline earth metal
     From 1869-1871 he revised and added the elements to fit into the table he had created
     He altered the accepted atomic weights to make them fit because there were the transition metals and the rare earth metals that didn’t fit the pattern that he discovered before
    Many people were questioning his decision to change the elements masses but they thought that they organization was good and so it might work out. He was also considered one of the greatest chemists at the time.

    Sacks, Oliver. “Best Invention Everything in Its Place.” New York Times Magazine. April 18, 1999. Newsbank. http://infoweb.newsbank.com/iw-search/we/InfoWeb?p_product=AWNB&p_theme=aggregated5&p_action=doc&p_docid=11421F7941D12DC6&p_docnum=4&p_queryname=2

    Mendeleev’s Table. History Resource Center: World. http://galenet.galegroup.com/servlet/History/hits?docNum=CD2210013968&tab=16&locID=menlo_schlib&origSearch=false&hdb=MW&t=RK&s=1&r=d&
    items=0&secondary=true&o=&sortOrder=RE&n=10&l=dI&sgPhrase=true&c=1&tabMap=114&bucket=
    img&SU=periodic+table

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