Dmitri+Mendeleev

Country of Origin: Siberia Year of Discovery: 1889 Dmitri Mendeleev was the last of fourteen children born in Siberia to a working family. As a young boy, his father went blind and his mother had to support the family. She moved the family to St. Petersburg and worked endlessly to get her youngest boy into college. After studying in St. Petersburg, he became a professor in 1866.
 * //Dmitri Mendeleev (1837-1907)//**

In 1889, Mendeleev formed his “law of periodicity” and found that “certain properties of the elements can be foretold from their atomic weights.” He is best known for his work with his periodic table and he arranged elements onto a table. At the time, only 63 elements had been discovered but he placed all of these onto a periodic table and arranged them according to their atomic masses. He was smart enough to leave spaces available for elements that had not yet been discovered, but he knew they were out there. His table did not contain any Noble Gasses, but it was arranged in a proper manner that could be expanded upon easily once they were discovered.

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