February 2, 1907 (, Heigo In the twelfth lunar month twenty), Russian chemist Mendeleev's death.


Russian chemist Mendeleyev In February 1907, the Russian chemist Suleyman Terry Ivanovich Mendeleev (1834-1907) died. His most important contribution of the chemical: elements periodic classification.
Mendeleev in 1869 to 1871, written in the book of chemical principles. Explore the relationship between the elements of nature, arranged in a table of all the known elements in order of increasing atomic weight. The periodic table becoming the skeleton of most of the chemical theory. His proposed solution hydration theory in 1887, is a pioneer of modern solution doctrine, Mendeleev also investigated the relationship with the temperature and pressure of the gas and liquid volume, and found that the critical temperature of the gas.