Friday, May 31, 2019

periodic table Essay -- essays research papers

The History of the Periodic Table of Elements Dmitri Mendeleev and the early Periodic Table Dmitri Mendeleev was natural in Tobolsk, Siberia on February 7, 1834 .He was the youngest of 14 children born to mare Dmitrievna Korniliev and Ivan Pavlovitch Mendeleev. His father was director of the local gymnasium. female horse Kornilievs family settled in Tobolsk in the early 1700s and introduced paper- and glass-making to Siberia. Unfortunately, Ivan died when Dmitri was quite young, going his wife to support the large family. The death hit them hard economically especially for a large family, which meant that Maria had no other choice just now to find work. Marias family owned a glass factory and they allowed her to take over managing the company so she could support the family. Dmitri, beingness the youngest, appears to have been his mothers favorite child and was provided as many opportunities as she could afford. From his early years, she began to save money for Dmitri to atten d the university. As he grew older, it became apparent that he had a bright future. At the age of 14, he was attending the Gymnasium in Tobolsk and his mother was continuing to plan for his future. In that year, however, a second major family tragedy occurred the glass factory burned to the ground. The family was devastated. Maria was not about to give up her dreams for her son. She knew at this point that Dmitris only hope to go on to school was to win a scholarship. So in his final years at the gymnasium, Maria pushed Dmitri to improve his grades and prepare for entrance exams. After much nagging from his mother and Bessargin, Mendeleev passed his gymnasium exams and prepared to enter the university. In 1849 they moved Moscow. At this point the family included Maria, Dmitri, and Elizabeth (Dmitris older sister). In Moscow, they entered a climate of considerable political uproar, which made the university reluctant to admit anyone from outside of Moscow. Mendeleev was rejected. Mar ia did not give up, however, and the family headed for St. Petersburg. Mendeleev was left alone to face his work at the university. Dmitri fell right into his work at St. Petersburg. Mendeleev graduated and was awarded the medal of excellence for being first in his class. Mendeleev already had his lifes ambitions in mind and, hoping to extend his life as long as possible, he moved to Simferopol in the Crimean Peni... ...spPuAmCmBkCfEsFmMdNoLr189918281917178919401940194519441949195019521953195519571961* Known to ancient civilizationsElement Groups (Families)Alkali Earth Alkaline Earth regeneration MetalsRare EarthOther MetalsMetalloidsNon-MetalsHalogensNoble Gases

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