D. I. Mendeleyev, the great Russian chemist, was born in Siberia on the eighth of February, 1834. When he was seven years old, he went to gymnasium in Tobolsk. He studied very hard, he especially liked mathematics, physics and history.

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At the age of 16 he entered the Pedagogical Institute in St. Petersburg, physico-mathematical department. He graduated from the Institute in 1855 and began 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. Besides lectures and supervision of the laboratory, D. I. Mendeleyev carried out great research work.
Mendeleyev’s greatest discovery wasthe Periodic Table. The Periodic Law suggested by Mendeleyev stated that the properties of the elements were a periodic function of their atomic masses. He presented the work to the Russian Chemical 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 anyone who doesn’t know this Russian scientist and his Periodic Law. We are proud of D. I. Mendeleyev who did so much for his country, for the development of world science.

1. When was D. I. Mendeleyev born?
2. What subjects did he like?
3. When was he granted the Doctor of Science degree?
4. What was Mendeleyev's greatest discovery?
5. What other problems was Mendeleyev interested in?
6. What subjects did his numerous works deal with?