A few months later, Meyer published a revised and expanded version of his 1864 table independently, which was similar to that published by Mendeleev and a paper showing graphically the periodicity of the elements as a function of atomic weight. In 1869, Dmitri Mendeleev published a periodic table of all known elements. Works on organizing the elements by atomic weight, until then had been stymied by inaccurate measurements of the atomic weights. The textbook went through five editions and was translated into English, French, and Russian. His book, Die modernen Theorien der Chemie, which he began writing in Breslau in 1862 and which was published in 1864, contained an early version of the periodic table containing 28 elements, classified elements into six families by their valence - for the first time, elements had been grouped according to their valence, a number referred to as the combining power of each element to link together a particular family. According to him, if the atomic weights were plotted as ordinates and the atomic volumes as abscissae - the curve obtained a series of maxima and minima - the most electro-positive elements appearing at the peaks of the curve in the order of their atomic weights. Newlands did in England, if each element is arranged in the order of their atomic weights, they fall into groups of similar chemical and physical properties repeated at periodic intervals. Meyer is best known for his part in the periodic classification of the chemical elements. In 1866, Meyer accepted a post at the Eberswalde Forestry Academy at Neustadt-Eberswalde, where he remained until 1868, when he went to the Polytechnikum in Karlsruhe to be appointed a professor. In 1859 he became Privatdozent in physics and chemistry at the University of Breslau. Periodic Classification of Chemical Elements With this interest in the physiology of respiration, he had recognized that oxygen combines with the hemoglobin in blood. in Breslau with a thesis on the action of carbon monoxide on the blood. He also pursued there his earlier physiological interests by studying the effect of carbon monoxide on the blood. At Königsberg his studies were devoted mainly to mathematical physics under the guidance of mineralogist, physicist and mathematician Franz Ernst Neumann. From thence he migrated to Königsberg, where he remained until 1858. degree from Würzburg in 1854, he went to Heidelberg, where Robert Bunsen held the chair of chemistry. In 1853, he went to the University of Würzburg, where he studied pathology, as a student of famous Prussian physician Rudolf Virchow. He studied under Carl Ludwig, which prompted him to devote his attention to also physiological chemistry. After attending the Altes Gymnasium in Oldenburg, he studied medicine at the University of Zurich in 1851. Julius Lothar Meyer was born in Varel, Germany (then part of the Duchy of Oldenburg), as the son of Friedrich August Meyer, a physician, and Anna Biermann. – Lothar Meyer, speculating in 1870, on the existence of subatomic particles, Julius Lothar Meyer – Early Years Rather it seems, that the atoms of elements are not the final, but only the immediate constituents of the molecules of both the elements and the compounds-the Molekeln or molecule as foremost division of matter, the atoms being considered as second order, in turn consisting of matter particles of a third higher order.” “That the as yet undivided chemical elements are absolutely irreducible substances, is currently at least very unlikely. However, he did not develop the periodic classification of the chemical elements as thoroughly as Mendeleev. He discovered the Periodic Law, independently of Dmitry Mendeleev, at about the same time ( 1869). Meyer was one of the pioneers in developing the first periodic table of chemical elements. On August 19, 1830, German chemist Julius Lothar Meyer was born.
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