Introduction to the Rarer ElementsJ. Wiley & sons, 1912 - 232 pagina's |
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Veelvoorkomende woorden en zinsdelen
acetic acid solution acidified add sodium alkali alloys aluminum Amer ammonium hydroxide ammonium sulphide anorg aqua regia barium beryllium boiling bromates Bromides cæsium and rubidium cerium Chem Chim chloroplatinic circa color Complex silicate compounds Compt containing crystallization cyanide decomposed didymium dilute dioxide Discovery dissolved double chloride double sulphate Dtsch element elementary evaporate excess Experiment extracted with water Filter filtrate fluoride fused gold heated hydrochloric acid hydrogen sulphide ignition insoluble iridium iron Jour lanthanum lithium methods mineral molybdate molybdenum niobium nitrate nitric acid Note obtained osmium oxalic acid oxide palladium phosphate potassium iodide potassium sulphate powder praseodymium precipitate radium rare earths rend residue rhodium rubidium ruthenium salt add selenious selenious acid selenium separated soluble specific gravity spectrum sulphuric acid tantalum tellurium terbium tetroxide thallium thallous thorium titanium treated Try the action tungstate tungsten Typical forms uranium vanadate vanadium warm yttrium Zeitsch zinc Zircon zirconium
Populaire passages
Pagina 22 - ... e is the base of the natural system of logarithms and X is the disintegration constant.
Pagina 167 - rhodium," from the rose colour of a dilute solution of the salts containing it. (») In 1826 Osann claimed the discovery of three new elements in platinum alloys. These he named ruthenium, polinium, and pluranium. Later he withdrew the claim In 1844 Clauss found that there was an unknown metal in the mixture of substances which had been called by Osann " ruthenium oxide," and for it he retained the name ruthenium, derived from Ruthenia.
Pagina 166 - UPON making some experiments, last summer, on the black powder which remains after the solution of platina, I observed that it did not, as was generally believed, consist chiefly of plumbago, but contained some unknown metallic ingredients. Intending to repeat my experiments with more attention during the winter, I mentioned the result of them to Sir JOSEPH BANKS, together with my intention of communicating to the Royal Society, my examination of this substance, as soon as it should appear in any...
Pagina 181 - У to 10. When sodium is exposed to the atmosphere, it immediately tarnishes, and by degrees becomes covered with a white crust, which diliquesces much more slowly than the substance which forms on the base of potass. This crust is very pure...
Pagina 190 - Argon resembles nitrogen in that it gives two distinct spectra according to the strength of the induction current employed. But while the two spectra of nitrogen are different in character, one showing fluted bands and the other sharp lines, the argon spectra both consist of sharp lines.
Pagina 196 - The use of the tantalum filament as a substitute for carbon is certainly an interesting step in the development of incandescent electric lighting. The tantalum lamp produces a light of one...
Pagina 150 - Chim. et Phys. ccix. 173) obtained the value 121 from the electrolysis of the chloride. Pure antimony is quite permanent in air at ordinary temperatures, but when heated in air or oxygen it burns, forming the trioxide. It decomposes steam at a red heat, and burns (especially when finely powdered)in chlorine. Dilute hydrochloric acid is without action on it, but on warming with the concentrated acid, antimony trichloride is formed; it dissolves in warm concentrated sulphuric acid, the sulphate...
Pagina 157 - Several papers concerning a new semi-metal called platina. Pt. 1. Letter enclosing metal, by W. Brownrigg, p. 584. 2. Memoirs of a semi-metal called Platina di Pinto, found in the Spanish West Indies, p. 585. 3. Letter from Watson, p. 590. 4. Note, p. 593 (incorrectly paged 589). 5. Further experiments, by Wm. Brownrigg, p. 594. Phil. Trans. London, 46 (1751), 584; Phil. Trans. London, Abridg., 10 (1809), 97. 1751: 2. T.
Pagina 107 - OF THE SAME BY TITRATION IN ALKALINE SOLUTION WITH IODINE. BY PHILIP E. BROWNING.* THE reduction of vanadic acid from the condition of the pentoxide to that of the tetroxide by the action of hydriodic and hydrobromic acids has been applied to the volumetric determination of vanadium.