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Дмитрий Иванович Менделеев — знаменитый русский химик. Он является самым известным для его развития свойств химических элементов таблицы Менделеева. Эта таблица показывает, что элементы свойства изменяются периодически, когда они упорядоченные атомный вес. Менделеев родился в 1834 году в Тобольск, Сибирь. Он изучал химию в Университет Санкт-Петербурга и в 1859 году он был направлен на учебу в университете Гейдельберг. Менделеев возвращается в Петербург и стал профессором Химия в техническом институте в 1863 году. Он стал профессором общего Химии в университете Санкт-Петербурге в 1866 году. Менделеев был хорошо-известный учитель, и, потому, что там был не хороший учебник по химии в то время, Он написал в двух томах» принципы химии» ставший классическим Учебник по химии. В этой книге Менделеев пытался классифицировать элементы согласно их химические свойства. В 1869 году он опубликовал свою первую версию его периодической таблицы элементы. В 1871 году он опубликовал усовершенствованный вариант периодической таблицы, в которой Он оставил пробелы для элементов, которые не были известны в то время. Его таблица и теории позже подтвердились, когда три предсказал элементы: галлий, германий, и были обнаружены скандия. Менделеев исследовал химические теории решения. Он обнаружил, что Лучшие пропорции спирта и воды в водке-40%. Он также исследовал тепловое расширение жидкостей и характер нефти. В 1893 году он стал директором бюро мер и весов в Св. Петербург и занимал этот пост до своей смерти в 1907 году.

Answer 1

Dmitry Ivanovich Mendeleev is a famous Russian chemist. He is best known for his development of the properties of the chemical elements of the periodic table. This table shows that property elements change periodically when they are ordered atomic weight. Mendeleev was born in 1834 in Tobolsk, Siberia. He studied chemistry at the University of St. Petersburg and in 1859 he was sent to study at the University of Heidelberg. Mendeleev returns to St. Petersburg and became a professor of chemistry at a technical institute in 1863. He became a professor of general chemistry at the University of St. Petersburg in 1866. Mendeleev was a well-known teacher, and, because there was not a good textbook on chemistry at that time, He wrote in two volumes "Principles of Chemistry", which became a classic Textbook on Chemistry. In this book, Mendeleev tried to classify elements according to their chemical properties. In 1869, he published his first version of his periodic table of elements. In 1871, he published an improved version of the periodic table in which He left spaces for elements that were not known at that time. His table and theories were later confirmed when three predicted elements: gallium, germanium, and scandium were discovered. Mendeleev investigated chemical solution theories. He found that the best proportions of alcohol and water in vodka are 40%. He also investigated the thermal expansion of liquids and the nature of oil. In 1893, he became director of the Bureau of Weights and Measures in St. Petersburg and held this post until his death in 1907.

Answer 2

Dmitri Ivanovich Mendeleev is a famous Russian chemist. He is best known for his development of the properties of the chemical elements of the periodic table. This table shows that property elements change periodically when they are ordered by atomic weight. Mendeleev was born in 1834 in Tobolsk, Siberia. He studied chemistry at the University of Saint Petersburg and in 1859 he was sent to study at the University of Heidelberg. Mendeleev returned to St. Petersburg and became a Professor of Chemistry at the technical Institute in 1863. He became a Professor of General Chemistry at the University of Saint Petersburg in 1866. Mendeleev was a well-known teacher, and because there was not a good chemistry textbook at the time, he wrote in two volumes" principles of chemistry" which became a classic chemistry Textbook. In this book, Mendeleev tried to classify elements according to their chemical properties. In 1869, he published his first version of his periodic table of elements. In 1871, he published an improved version of the periodic table, in which he left spaces for elements that were not known at the time. His table and theories were later confirmed when three predicted elements: gallium, germanium, and scandium were discovered. Mendeleev investigated the chemical theory of solutions. He found that the Best proportions of alcohol and water in vodka are 40%. He also investigated the thermal expansion of liquids and the nature of oil. In 1893, he became Director of the Bureau of weights and measures in St. Petersburg. Petersburg and held this post until his death in 1907.

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