Dmitri Mendeleev arranged elements into seven groups with similar properties.  His discovery that the properties of elements are periodic functions of their atomic weights is called Periodic Law.  He is the father of the periodic table.  In his periodic table, he grouped elements on the basis of similar chemical properties.  He left blank spaces open to add new elements where he predicted they would occur.  He accepted minor inversions when placing the elements in order of increasing atomic mass.  He predicted propertives of undiscovered elements, allowing for his theories to be tested.

Links to Dmitri Mendeleev http://www.zephyrus.co.uk/dimitrimendeleev.html      Biography http://www.pbs.org/wnet/hawking/cosmostar/html/stars_mendel.html      PBS Biography http://chemlab.pc.maricopa.edu/periodic/foldedtable.html      Diagrams and pictures http://www.chemistry.co.nz/mendeleev.htm      Biography

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Jessica Gee, Jessica Wong...last updated 2 June 2003