Estimates of the concentration of reactants are therefore made possible. Kryptonate activity is sensitive to chemical reactions at the solution surface. During this process, kryptonates are formed. 85Kr can be used for chemical analysis by imbedding the isotope in various solids. Krypton clathrates are prepared using hydroquinone and phenol. Molecule-ions of ArKr+ and KrH+ have been identified and investigated, and evidence is provided for the formation of KrXe or KrXe+. A higher fluoride of krypton and a salt of an oxyacid of krypton also have been reported. Krypton difluoride has been prepared in gram quantities and can be made by several methods. While krypton is generally thought of as a rare gas that normally does not combine with other elements to form compounds, it now appears that the existence of some krypton compounds can exist. Ionized krypton gas appears whitish - see photo on left - which makes. The spectral lines of krypton are easily produced and some are very sharp. Uses: Krypton is used in lighting products. The spectral lines of krypton are easily produced and some are very sharp. Krypton is a noble gas, and it is characterised by its brilliant green and orange spectral lines. Solid krypton is a white crystalline substance. Seventeen other unstable isotopes are recognized. Under normal conditions krypton is colourless, odourless, fairly expensive gas. Naturally occurring krypton contains six stable isotopes. It is characterized by its brilliant green and orange spectral lines. Solid krypton is a white crystalline substance with a face-centered cubic structure which is common to all the "rare gases." Properties The atmosphere of Mars has been found to contain 0.3 ppm of krypton. Krypton is present in the air to the extent of about 1 ppm. In October 1983, the meter, which originally was defined as being one ten millionth of a quadrant of the earth's polar circumference, was again redefined by the International Bureau of Weights and Measures as being the length of a path traveled by light in a vacuum during a time interval of 1/299,792,458 of a second. This replaced the standard meter of Paris, which was defined in terms of a bar made of a platinum-iridium alloy. An alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly chemically reactive. In 1960 it was internationally agreed that the fundamental unit of length, the meter, should be defined in terms of the orange-red spectral line of 86Kr. It has an estimated density of 40.7 x 103 kg/m3. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. Solid krypton is a white crystalline substance with a face-centered cubic structure which is common to all the rare gases. Discovered in 1898 by Ramsay and Travers in the residue left after liquid air had nearly boiled away. Hassium is a chemical element with symbol Hs and atomic number 108. 2, 1, 0 (rarely more than 0 unknown oxide)įrom the Greek word kryptos, hidden.
0 kommentar(er)
