List of publications on a keyword: «Mendeleev»


Физика

Publication date: 11.07.2018
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Gennadiy G. Haydarov , candidate of technical sciences , associate professor
Andrey G. Haydarov , candidate of technical sciences , associate professor
St. Petersburg State Technological Institute (Technological University) , Санкт-Петербург г

«Correlation of temperatures of melting and boiling of substances from the hypotheses of unpacking the substance»

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According to the properties of melting points and boiling points of the elements of the periodic table of D.I. Mendeleyev the application of the unpacking hypothesis of the substance was verified. The article contains the results of the verification. In general, according to the data for 98 substances taken from the information in Internet, convergence of results with an error of up to 40% for 73 substances was obtained. The effect of periodicity on the result is found. An exception to the calculated dependences was obtained for ten substances: noble gas and most halogens. A large discrepancy between the theoretical formulas and the reference data was also caused by the 14 elements of the middle groups.

Химия

Publication date: 17.10.2019
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Igor V. Semenov , ученик 8 «А» класса
Irina V. Iakovleva , учитель
MEI "P.A. Stolypin School №21" , Саратовская обл

«Dmitry Ivanovich Mendeleev - Creator of the Periodic System of Chemical Elements»

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The author of the article addresses significant milestones in the life path of Dmitry Ivanovich Mendeleev, gives the statement of the historian of science, academician B.M. Kedrova, characterizing the personality of the creator of the Periodic system of chemical elements.