tell a story the periodic table
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historical development of the periodic tableTRANSCRIPT
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The Brief History of the Development of Periodic Table
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In the beginning
By 1869, a total of 63 elements had been discovered.
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Scientists began to develop classification schemes.
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Law of Triads
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In 1829, Johann Dobereiner proposed that nature contained triads of elements.
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First attempt at designing a periodic table
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In 1862, De Chancourtois transcribed a list of the elements positioned on a cylinder in terms of increasing atomic weight.
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Law of octaves
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In 1863, John Newlands classified the 56 established elements into 11 groups based on similar physical properties.
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Who Is The Father of the Periodic Table?
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Mendeleev's table became available to the scientific community via publication (1869) before Meyer's appeared (1870).
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Mendeleev’s periodic table was formed by arranging cards for each of the known 63 elements.
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The table showed similarities in an entire network of vertical, horizontal, and diagonal relationships.
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In 1906, Mendeleev came within one vote of being awarded the Nobel Prize for his work.
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Discovery of the Noble Gases
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In 1895, Lord Rayleigh reported the discovery of a new gaseous element named argon.
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In 1898, William Ramsey suggested that argon be placed in a family with helium.
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Atomic Structure and the Periodic Table
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Scientists of the 20th Century attempted to explain why the properties of the elements recur periodically.
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The discovery of isotopes of the elements revealed the properties of the elements varied periodically with atomic number..
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The Modern Periodic Table
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Seaborg reconfigured the periodic table by placing the actinide series below the lanthanide series.
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In 1951, Seaborg was awarded the Nobel Prize in chemistry for his work.
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References• http://www.wou.edu/las/physci/ch412/perhist.htm• http://www.meta-synthesis.com/.../35_pt/pt_database.php• http://www.wellness-test-panel.com/images/Chemistry-Picture.jpg• http://www.rsc.org/education/teachers/learnnet/periodictable/scientists/
chancourtois.jpg• http://www.msnucleus.org/membership/html/jh/physical/periodictable/images/
MendeleevPeriodic.gif• http://elements.vanderkrogt.net/images/dimitri.gif• http://www.wired.com/images/index/2008/02/john_newlands_250px.jpg• http://www.unit5.org/chemistry/christjs/ptnewld.gif• http://www.unit5.org/chemistry/christjs/Develop%20Periodic%20Table.htm• http://www.atomicarchive.com/Images/bio/B51.jpg• http://www.ci.lafayette.ca.us/vertical/Sites/%7BC1C49B72-3D02-4C7B-82A7-
92186ABD75FF%7D/uploads/%7B30585E74-175A-4182-8F26-19693D4749C4%7D.JPG
• http://www.twosteptidewater.com/photo-album/universe.jpg
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• http://www.softpicks.net/screenshots/3D-Chemical-Elements-ScreenSaver.jpg• http://www.marksandspencer.com/gp/node/n/60479031• http://html.rincondelvago.com/000286860.png• http://www.unit5.org/christjs/triads.gif• http://www.gutenberg.org/files/20417/20417-h/images/image056.jpg• http://allperiodictables.com/ClientPages/Cardspages/Cardspix/cards.jpg• http://stjsaskatoon.googlepages.com/Nobel_medal.jpg/Nobel_medal-full;init:.jpg• http://www.assumption.edu/users/bniece/Spectra/HiResolution/Neb.jpg• http://z.about.com/d/chemistry/1/0/7/Q/argon1.jpg• http://www.intcul.tohoku.ac.jp/~yamaguch/JPG/systemic_room_supplement/
sft_profile/atomic_structure.gif• http://www.geog.ucsb.edu/~williams/hydrogen_isotope_masses.jpg• http://physci.llnl.gov/Research/scattering/LordRayleigh.jpg• http://lgeku.energyunderground.com/images/images-deepearth/ramsay.jpg• http://www.irc.vbschools.com/ForTheWeb/Science/images/PeriodicTable.jpg