Who was Dmitri Ivanovich Mandeelev?
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Answer:
Dmitri Mendeleev, Russian in full Dmitry Ivanovich Mendeleyev, (born January 27 (February 8, New Style), 1834, Tobolsk, Siberia, Russian Empire—died January 20 (February 2), 1907, St. Petersburg, Russia), Russian chemist who developed the periodic classification of the elements. Mendeleev found that, when all the known chemical elements were arranged in order of increasing atomic weight, the resulting table displayed a recurring pattern, or periodicity, of properties within groups of elements. In his version of the periodic table of 1871, he left gaps in places where he believed unknown elements would find their place. He even predicted the likely properties of three of the potential elements. The subsequent proof of many of his predictions within his lifetime brought fame to Mendeleev as the founder of the periodic law.
Explanation:
Mendeleev was born in the small Siberian town of Tobolsk as the last of 14 surviving children (or 13, depending on the source) of Ivan Pavlovich Mendeleev, a teacher at the local gymnasium, and Mariya Dmitriyevna Kornileva. Dmitri’s father became blind in the year of Dmitri’s birth and died in 1847. To support the family, his mother turned to operating a small glass factory owned by her family in a nearby town. The factory burned down in December 1848, and Dmitri’s mother took him to St. Petersburg, where he enrolled in the Main Pedagogical Institute. His mother died soon after, and Mendeleev graduated in 1855. He got his first teaching position at Simferopol in Crimea. He stayed there only two months and, after a short time at the lyceum of Odessa, decided to go back to St. Petersburg to continue his education. He received a master’s degree in 1856 and began to conduct research in organic chemistry. Financed by a government fellowship, he went to study abroad for two years at the University of Heidelberg. Instead of working closely with the prominent chemists of the university, including Robert Bunsen, Emil Erlenmeyer, and August Kekulé, he set up a laboratory in his own apartment.