Famous ChemistsGeorge Allen, 1911 - 247 oldal |
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afterwards alcohol alkali alkyl ammonia aniline anthraquinone atomic weight atoms of hydrogen became benzene Berthollet Berzelius bromine Bunsen C₂H cacodyl calx carbon dioxide Cavendish chemical chemists chlorine combustion common air compound atom contain Copley Medal cyanogen Dalton Davy decomposed dephlogisticated diffusion discovered discovery dissolved distilling Dumas electricity elements ether ethyl experiments Faraday fixed air Frankland gases gave Gay-Lussac give glass Graham H₂ H₂O heat Hofmann hydrochloric acid hydrogen inflammable air investigation iodide isomeric Kekulé laboratory Lavoisier lectures Liebig liquid marine acid Mendeleeff mercury metals method methylamine Meyer mixture molecule muriatic acid nitric acid nitrogen nitrous O₂ obtained oxide oxygen Pasteur Perkin phlogiston Phlogiston Theory potash potassium prepared Priestley Professor of Chemistry properties quantity racemic racemic acid radical researches Royal Society salts Scheele showed sodium solution sulphuric acid synthesised tartaric acid temperature theory tube vapour density vessel volume of oxygen Wöhler zinc
Népszerű szakaszok
198. oldal - When the formulae of inorganic chemical compounds are considered, even a superficial observer is struck with the general symmetry of their construction; the compounds of nitrogen, phosphorus, antimony, and arsenic especially exhibit the tendency of these elements to form compounds containing 3 or 5...
207. oldal - ... the atoms were gamboling before my eyes. This time the smaller groups kept modestly in the background. My mental eye, rendered more acute by repeated visions of this kind, could now distinguish larger structures, of manifold conformation; long rows, sometimes more closely fitted together; all twining and twisting in snakelike motion. But look! What was that? One of the snakes had seized hold of its own tail, and the form whirled mockingly before my eyes. As if by a flash of lightning I awoke...
66. oldal - I am nearly persuaded that the circumstance depends upon the weight and number of the ultimate particles of the several gases: those whose particles are lightest and single being least ahsorbable, and the others more according as they increase in weight and complexity.
77. oldal - Under these circumstances a vivid action was soon observed to take place. The potash began to fuse at both its points of electrization. There was a violent effervescence at the upper surface ; at the lower, or negative surface, there was no liberation of elastic fluid; but small globules having a high metallic lustre, and being precisely similar in visible characters to quicksilver, appeared, some of which burnt with explosion and bright flame, as soon as they were formed, and others remained, and...
19. oldal - The cock was then again opened so as to let in more of the same air to supply the place of that destroyed by the explosion, which was again fired, and the operation continued till almost the whole of the mixture...
146. oldal - It seems to be molecules only which can pass; and these may be supposed to pass wholly unimpeded by friction ; for the smallest pores that can be imagined to exist in the graphite must be tunnels in magnitude, to the ultimate atoms of a gaseous body. The sole motive agency appears to be that intestine movement of molecules which is now generally recognized as an essential property of the gaseous condition of matter.
69. oldal - The following general rules may be adopted as guides in all our investigations respecting chemical synthesis. 1st. When only one combination of two bodies can be obtained, it must be presumed to be a binary one, unless some cause appear to the contrary.
179. oldal - Are the atoms of the dextro acid grouped in the form of a righthanded spiral, or are they placed at the apex of an irregular tetrahedron, or are they disposed according to this or that asymmetric arrangement? We do not know. But there can be no doubt that we are dealing with...
18. oldal - By this means upwards of 135 grains of water were condensed in the cylinder, which had no taste nor smell, and which left no sensible sediment when evaporated to dryness ; neither did it yield any pungent smell during the evaporation ; in short, it seemed pure water.
67. oldal - An inquiry into the relative weights of the . . ultimate particles of bodies is a subject, as far as I know, entirely new : I have lately been prosecuting this enquiry with remarkable success.