Практикалық сабақтарының тақырыптары мен мазмұны Practical assignment №1
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chemistry (1)
| carbon dioxide C02 – двуокись углерода
sulphuric acid H2S04 – серная кислота to indicate – указывать, означать statement – формулировка to decompose – разлагаться (на составные части) D. I. Mendeleyev, the great Russian chemist, was born in Siberia on February 8, 1834. When seven years old he went to gymnasium in Tobolsk. He studied very hard, he especially liked mathematics, physics and history. At the age of 16 he entered the Pedagogical Institute in St. Petersburg, physicomathematical department. He graduated from the Ins-.itute in 1855 and began to teach chemistry at the Technological Institute and then at the University In 1865 Mendeleyev was granted the Doctor of Science degree for the thesis on the combination of alcohol with water. This work was both of great theoretical and practical significance. Soon after that D.I.Mendeleyev was appointed Professor of General Chemistry of St. Petersburg University. Despite lectures and supervision of the laboratory, D. I. Mendeleyev carried on great research work. Mendeleyev's greatest discovery was the Period c Law. The Periodic Law suggested by Mendeleyev stated that the properties of the elements were a periodic function of their atomic masses. He presented this work to the Russian Chernical Society. Mendeleyev's Periodic Law opened a new era in the history of chemistry. Mendeleyev was interested in many branches of science, indeed there is hardly any field of science that was not enriched by his contribution. His numerous works dealt with many subjects: properties of liquids, theories of solutions, the development of the gas law, the use of oil and many others, D. I. Mendeleyev was a great patriot. He did everything for the development and progress of his country. D. I. Mendeleyev continued his research work to the very last day of his life. He died in 1907. The world is thankful to Mendeleyev for his great contribution to the world science. At present there is hardly anybody who doesn't know this Russian scientist and his Periodic Law. D. I. Mendeleyev did very much for his country, for the development of the world science. жүктеу/скачать 64,23 Kb. Достарыңызбен бөлісу:
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