7/3/2023 0 Comments Periodic table chemistry 201For a long time the priority dispute between Meyer and Mendeleev remained. In the following years the two tables had to undergo severe tests. in 1868, the German chemist Lothar Meyer had written down a very similar periodic system of elements. Petersburg in Russia, Mendeleev conjectured an arrangement of the then known 63 elements and presented a draft table, based on atomic masses, in March 1869 to the Russian Chemical Society. At that conference a young Russian chemist named Dmitri Mendeleev was also present, having come to Germany in 1859 on a 2-year state stipend to work under guidance of Robert Bunsen and Gustav Kirchhoff at the University of Heidelberg. This turned out to be a crucial step towards establishing the periodic system. During this conference the famous Italian chemist Stanislav Cannizzaro delivered a masterly lecture, as a result of which the chemistry community adopted a unified system of atomic masses. The main aim of the conference was to establish standardisation methods in chemistry. In 1860 the first ever international chemistry conference was held in Karlsruhe, Germany, under the chair of August Kekulé, with many pioneering chemists participating, among them Robert Bunsen and Michael Faraday. Several chemists were attempting to discern some distinct patterns in their physico-chemical properties. 2 Origin and development of the Periodic TableĪ large number of chemical elements were discovered in the second half of the 18 th century and the first half of the 19 th century. In this Editorial we shortly describe the origin and development of the Periodic Table and give a brief overview of its present status, discussing some related areas of particular significance to radiochemistry. Since radiochemistry has contributed substantially to the extension of the Periodic Table as well as to the development of various applications related to it, this special issue of Radiochimica Acta is being published as a part of international celebrations. Even a few newspapers and magazines have printed relevant articles. Furthermore, a large number of journals are publishing editorials, commentaries or special issues, and a few publishers are bringing out special pamphlets to mark the occasion. have been going on around the world, with the aim to increase the public awareness of science in general, and chemistry in particular. conferences, symposia, popular lectures, exhibitions and social gatherings, etc. Since then different types of functions, e.g. The IYPT was officially launched on 29 January 2019 at the UNESCO headquarters in Paris, France. As expected, the decision was hailed with great enthusiasm by a large number of national, regional and international chemical societies and other scientific organisations. It should commemorate the 150 th anniversary of the creation of that Table. This decision was based on a strong appreciation of international character of scientific cooperation pursued in several frontier areas of basic and applied sciences related to the Periodic Table. On the recommendation of the United Nations General Assembly and the specific resolve of the United Nations Educational, Scientific and Cultural Organisation (UNESCO), the year 2019 was declared as the International Year of the Periodic Table of Chemical Elements (IYPT 2019).
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