Dmitri Mendeleev
Dmitri Ivanovich Mendeleev was born in Tobolsk, Siberia, on February 7, 1834 (ns). The blonde-haired, blue-eyed boy was the youngest of 14 children (or 11 or 17, depending on the authority) born to Maria Dmitrievna Korniliev and Ivan Pavlovitch Mendeleev. His father (called Mendeleev because early in life he dealt in horses, "mjenu djelatj" = to make an exchange(4)) was director of the local gymnasium. Maria Korniliev's family settled in Tobolsk in the early 1700's and introduced paper- and glass-making to Siberia.(4) Unfortunately, Ivan died when Dmitri was quite young, leaving his wife to support the large family. The pension for educators at that time (1000 rubles) was drastically insufficient, especially for a large family, which meant that Maria had no other choice but to find work. Maria's family owned a glass factory in Aremziansk, and they allowed her to take over managing the company for a modest wage from which she could support the family.
Dmitri, being the youngest, appears to have been his mother's favorite child and was provided as many opportunities as she could afford. From his early years, she began to save money for Dmitri to attend the university. However, it was not only his mother who offered him special favors. He spent many hours in the glass factory his mother operated, learning from the chemist about the concepts behind glass making and from the glass blower about the art of making glass. Another influence in Dmitri's life was his sister Olga's husband, Bessargin. After being banished to Siberia for his political beliefs as a Russian Decembrist (Dekabrists, a group of literary men who headed a revolution in 1825(4),), Bessargin occupied himself teaching Dmitri the science of the day. Mendeleev's early years were guided by these people, and he was thus raised with three key thoughts:
"Everything in the world is science," from Bessargin
"Everything in the world is art," from Timofei the glass blower.
"Everything in the world is love," from Maria his mother. (16)
As he grew older, it became apparent that he had exceptional comprehension of complex topics. At the age of 14, he was attending the Gymnasium in Tobolsk and his mother was continuing to plan for his future. In that year, however, a second major family tragedy occurred; the glass factory burned to the ground. The family was devastated; there was no money to rebuild and the only money they had was the money saved for Dmitri to go to the university. Maria was not about to give up her dreams for her son. She knew at this point that Dmitri's only hope to go on to school was to win a scholarship. So in his final years at the gymnasium, Maria pushed Dmitri to improve his grades and prepare for entrance exams.
This was no easy task, as Dmitri was not a "classical" scholar. He knew at a very young age that he wanted to study science and saw very little need for studying topics such as Latin and history. He felt that these were dead topics and a waste of his time. After much coaxing from his mother and Bessargin, Mendeleev passed his gymnasium exams and prepared to enter the university.
In 1849, with nothing left for the family at Aremziansk, Maria loaded up the family's belongings and headed for Moscow. At this point the family included Maria, Dmitri, and Elizabeth (Dmitri's older sister). In Moscow, they entered a climate of considerable political unrest, which made the university reluctant to admit anyone from outside of Moscow. Mendeleev was rejected. Maria did not give up, however, and the family headed for St. Petersburg.
Again, they encountered similar turmoil but this time they found a friend of Ivan's working at the Pedagogical Institute, his father's school. With a little persuasion, Dmitri was allowed to take the entrance exams, which he passed, not with honors but well enough to be admitted to the science teacher training program on a full scholarship. He entered the university in the fall of 1850.
Maria died shortly after Dmitri's acceptance at St. Petersburg, followed a few short months later by Elizabeth; both died from tuberculosis. Mendeleev was left alone to face his work at the university.
From his first publication in 1854 entitled "Chemical Analysis of a Sample from Finland" to his final works in 1906 such as "A Project for a School for Teachers" and "Toward Knowledge of Russia", Mendeleev's transcripts revealing his research findings and beliefs number well over 250. His most famous publications include Organic Chemistry, which was published in 1861 when he was 27 years old. This book won the Domidov Prize and put Mendeleev on the forefront of Russian chemical education. The first edition of Principles of Chemistry was printed in 1868. Both of these books are classroom texts. Again, Mendeleev never lost sight of the importance of education.
Besides his work on general chemical concepts as discussed earlier, Mendeleev spent much of his time working to improve technological advances of Russia. Many of his research findings dealt with agricultural chemistry, oil refining, and mineral recovery. Dmitri was also one of the founding members of the Russian Chemical Society in 1868, and helped open the lines of communication between scientists in Europe and the United States.
Mendeleev also pursued studies on the properties and behavior of gases at high and low pressures, which led to his development of a very accurate differential barometer and further studies in meteorology. He also became interested in balloons, which led to a rather perilous adventure in 1887. In order to observe the solar eclipse above Klin, he made a solo ascent, without any prior experience; while his family was rather concerned, he paid no attention to controlling the balloon until after he had completed his observations, at which time he figured out how to land his conveyance. (4,9)
His greatest accomplishment, however, was the stating of the Periodic Law and the development of the Periodic Table. From early in his career, he felt that there was some type of order to the elements, and he spent more than thirteen years of his life collecting data and assembling the concept, initially with the idea of resolving some of the chaos in the field for his students. Mendeleev was one of the first modern-day scientists in that he did not rely solely on his own work but rather was in correspondence with scientists around the world in order to receive data that they had collected. He then used used their data along with his own data to arrange the elements according to their properties.
In 1866, Newlands published a relationship of the elements entitled the "Law of Octaves". Mendeleev's ideas were similar to those of Newlands but Dmitri had more data and felt that Newlands had not gone far enough in his research. By 1869, the Russian chemist had assembled detailed descriptions of more than 60 elements and, on March 6, 1869 a formal presentation was made to the Russian Chemical Society entitled "The Dependence Between the Properties of the Atomic Weights of the Elements." Unfortunately, Mendeleev was ill and the presentation was given by his colleague Professor Menshutken. There were eight points to his presentation:
1.) The elements, if arranged according to their atomic weights, exhibit an apparent periodicity of properties.
2.) Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs).
3.) The arrangement of the elements, or of groups of elements in the order of their atomic weights, corresponds to their so-called valencies, as well as, to some extent, to their distinctive chemical properties; as is apparent among other series in that of Li, Be, Ba, C, N, O, and Sn.
4.) The elements which are the most widely diffused have small atomic weights.
5.) The magnitude of the atomic weight determines the character of the element, just as the magnitude of the molecule determines the character of a compound body.
6.) We must expect the discovery of many as yet unknown elements-for example, elements analogous to aluminum and silicon- whose atomic weight would be between 65 and 75.
7.) The atomic weight of an element may sometimes be amended by a knowledge of those of its contiguous elements. Thus the atomic weight of tellurium must lie between 123 and 126, and cannot be 128.
8.) Certain characteristic properties of elements can be foretold from their atomic weights. (18)
On November 29, 1870, Mendeleev took his concept even further by stating that it was possible to predict the properties of undiscovered elements. He then proceeded to make predictions for three new elements (eka-aluminum, eka-boron and eka-silicon) and suggested several properties of each, including density, radii, and combining ratios with oxygen, among others. The science world was perplexed, and many scoffed at Mendeleev's predictions. It was not until November, 1875, when the Frenchman Lecoq de Boisbaudran discovered one of the predicted elements (eka-aluminum) which he named Gallium, that Dmitri's ideas were taken seriously. The other two elements were discovered later and their properties were found to be remarkably similar to those predicted by Mendeleev. These discoveries, verifying his predictions and substantiating his law, took him to the top of the science world. He was 35 years old when the initial paper was presented
Throughout the remainder of his life, Dmitri Mendeleev received numerous awards from various organizations including the Davy Medal from the Royal Society of England in 1882, the Copley Medal, the Society's highest award, in 1905, and honorary degrees from universities around the world. Following his resignation from the University of St. Petersburg, the Russian government in 1893 appointed him Director of the Bureau of Weights and Measures. This was believed to have been done to keep down public disapproval of the government. Mendeleev continued to be a popular social figure until his death. In his last lecture at the University of St. Petersburg Mendeleev said:
I have achieved an inner freedom. There is nothing in this world that I fear to say. No one nor anything can silence me. This is a good feeling. This is the feeling of a man. I want you to have this feeling too - it is my moral responsibility to help you achieve this inner freedom. I am an evolutionist of a peaceable type. Proceed in a logical and systematic manner. (16)
Dmitri Mendeleev was a man who rose out of the crowd to lead his people into the future. The motto of Mendeleev's life was work, which he stated as:
Work, look for peace and calm in work: you will find it nowhere else. Pleasures flit by - they are only for yourself; work leaves a mark of long-lasting joy, work is for others. (17)
On January 20, 1907 at the age of 73, while listening to a reading of Jules Verne's Journey to the North Pole, (4) Mendeleev passed away.
Bibliography
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Dictionary of Scientists, Peter Bedrick Books, New York, 1986.
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3. R. Clemens, Modern Chemical Discoveries, E.P. Dutton & Co., New York,1956, pp. 3-12.
4. B. Harrow, Eminent Chemists of Our Time, 2nd Ed., Van Nostrand, New York,1927, pp. 18-40; 273-285.
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11. H.M. Leicester, "Dmitrii Ivanovich Mendeleev", in E. Farber, ed., Great Chemists., Interscience, New York, 1961.
12. E.G. Mazurs, Graphic Representations of the Periodic System During One Hundred Years, Univ. Alabama Press, University, Alabama, 1975.
13. D. Mendeleeff, The Principles of Chemistry, 3rd English Ed., Longmans, Green, and Co., London, 1905.
14. J.R. Partington, A History of Chemistry, Vol. 4, Macmillan & Co., London, 1964, pp. 891-898.
15. M.M. Pattison Muir, A History of Chemical Theories and Laws, Arno Press, New York, 1975, pp. 353-375.
16. D.Q. Posin, Mendeleev, The Story of a Great Chemist, Whittlesey House, New York, 1948.
17. T.R. Seshadri, "Mendeleev-as Teacher and Patriot", in T.R. Sheshadri, , ed., Mendeleev's Periodic Classification of Elements and Its Applications, Proceedings of the Symposium held at IIT Kharagpur to celebrate the centenary of Mendeleev's Periodic Classification, Hindustan Pub. Co., Delhi-110007, India, 1973.
18. T.E. Thorpe, "Scientific Worthies XXVI. Dmitri Ivanowitsh Mendeleeff", Nature , 1889, XL, 193-197.
19. W.A. Tilden, Famous Chemists, The Men and their Work, Books for Libraries, Freeport, New York, 1921 (rep. 1968) pp. 240-258.
20. S.E. Vides Lemus, Clasificacion Periodica de Mendelejew, Editorial del Ministerio de Educacion Publica, Guatemala, 1959, pp. 25-27.
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