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Vsevolod Klechkovsky
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<h2 id="biography">Biography</h2> <p>He graduated in 1929 from the Moscow agricultural academy and worked there from 1930. He became a professor in 1955, and an academician of the All-Union Academy of Agricultural Sciences of the Soviet Union (known as <a href="/facts/VASKhNIL/Nv5e1fsH">VASKhNIL</a>) in 1956. </p><p>His use of <a href="/facts/Isotopic_labeling/Sqtr7c0G">isotopic labeling</a> in the advance of <a href="/facts/Soil_chemistry/fBA3Vz5w">soil chemistry</a> led to his being considered a founder of <a href="/facts/Radioecology/MkWouUxD">agricultural radiology</a>.<a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a><a class="footnote-ref" id="fnref:2" href="#fn:2"><sup>2</sup></a> He was one of the first to study plant nutrition using radioisotopes, for which he received the <a href="/facts/USSR_State_Prize/9fu2Ewjt">Stalin Prize</a> in 1952 along with his academy co-workers. He studied the behavior of heavy nuclei daughter isotopes in soils. </p><p>Following the 1957 <a href="/facts/Kyshtym_disaster/9wBSXJSN">Kyshtym disaster</a>, Klechkovsky led the research projects studying the long-term effects of radioactive contamination at the site.<a class="footnote-ref" id="fnref:3" href="#fn:3"><sup>3</sup></a> </p><p>Klechkovsky also studied theoretical chemistry, and proposed a theoretical justification of the empirical <a href="/facts/Aufbau_principle/GLqThvnE">Madelung rule</a> for the ordering of atomic orbital energies.<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a><a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> This rule is therefore sometimes called Klechkovsky's rule, especially in Russian and in French sources. </p> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Newsletter of the International Union of Radioecology Archived 2008-05-09 at the Wayback Machine #43, September 2005, "The XXXIII annual radioecological readings were held in Obninsk, October 21, 2004, and were dedicated to the memory of V.M. Klechkovsky (1900-1972), one of the founders of agricultural radiology." <a href="http://www.iur-uir.org/upload/mioncfnlgf.pdf" target="_blank">http://www.iur-uir.org/upload/mioncfnlgf.pdf</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> <li id="fn:2"><p>Radiation Risk Estimates in Normal and Emergency Situations: Proceedings of the NATO Advanced Research Workshop on Impact of Radiation Risk Estimates in Normal and Emergency Situations, Yerevan, Armenia, September 8-11 2005; ed. Arrigno A. Cigna and Marco Durante; Springer <a href="https://books.google.com/books?id=NH8QEPpq4-4C&q=given+the+task&pg=PA30" target="_blank">https://books.google.com/books?id=NH8QEPpq4-4C&q=given+the+task&pg=PA30</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li> <li id="fn:3"><p>Review of Nuclear Disaster in the Urals by Zhores A. Medvedev in the Bulletin of the Atomic Scientists, April 1980 <a href="https://books.google.com/books?id=NH8QEPpq4-4C&q=given+the+task&pg=PA30" target="_blank">https://books.google.com/books?id=NH8QEPpq4-4C&q=given+the+task&pg=PA30</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li> <li id="fn:4"><p>Klechkovsky, V. M. Zh. Exsperim. i Teor. Fiz., 41.465 (1962). [Translation: Soviet Physics J. Expt, and Theor. Phys. 14,334 (1962)] <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li> <li id="fn:5"><p>Wong, D. Pan (1979). "Theoretical justification of Madelung's rule". J. Chem. Educ. 56 (11): 714–18. Bibcode:1979JChEd..56..714W. doi:10.1021/ed056p714. <a href="https://pubs.acs.org/doi/pdf/10.1021/ed056p714" target="_blank">https://pubs.acs.org/doi/pdf/10.1021/ed056p714</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li> </ol>