![]() Īn Outline of the System of the Elements Lecture to the Russian Chemical Society as quoted in the article "Peering Into the Unseen-What Is Revealed?" in Awake! magazine (22 August 2000) ![]() Doctor, you have science, I have faith.-to his physician, this was possibly a Jules Verne quote.Faraday Lecture, the Royal Institution, London (1889) as quoted by Leon Gray, The Basics of the Periodic Table (2013).In science we must all submit not to what seems to us attractive from one point of view or another, but to what represents an agreement between theory and experiment."The Periodic Law of the Chemical Elements" Journal of the Chemical Society, 55, 634-56 (1889) Faraday Lecture delivered before the Chemical Society Fellows, Theatre of the Royal Institution (June 4th, 1889).To-day, 20 years after the above conclusions were formulated, they may still be considered as expressing the essence of the now well-known periodic law. I believe that the solution of some of the most important problems of our science lies in researches of this kind. exist between the atomic weights of dissimilar elements. Certain characteristic properties of the elements can be foretold from their atomic weights. Thus, the atomic weight of tellurium must lie between 123 and 126, and cannot be 128.Ĩ. The atomic weight of an element may sometimes be amended by a knowledge of those of the contiguous elements. ![]() We must expect the discovery of many yet unknown elements, for example, elements analogous to aluminium and silicon, whose atomic weight would be between 65 and 75.ħ. 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.Ħ. The elements which are the most widely diffused have small atomic weights.ĥ. 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 lithium, beryllium, barium, carbon, nitrogen, oxygen and iron Ĥ. Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (e.g., platinum, iridium, osmium) or which increase regularly (e.g., potassium, rubidium, caesium).ģ. The elements, if arranged according to their atomic weights, exhibit an evident periodicity of properties.Ģ. ![]()
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