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Tri Phan 28/9/11 Per 4 atomic number 18 Argon is a chemic gene represented by the symbol Ar. Argon has nuclear number 18 and is the third element in convocation 18 of the periodic table ( fearful gases). Argon is the third about common gas in the earth atmosphere, at 0.93%, qualification it more common than carbon dioxide. Nearly all of this are is radiogenic are-40 derived from the decay of potassium-40 in the Earths crust. In the universe, argon-36 is by far the close to common argon isotope, macrocosm the preferred argon isotope produced by stellar nucleus tax deduction in supernovas. Argon is dull in the solid and politic state Argon is a mono-atomic, under standard conditions, pale and odorless gas, which at 87.3 K (-185.8 ° C) and condensed at 83.6 K (-189.3 ° C) frozen. equal the some other noble gases pull out helium argon crystallizes in a cubic enveloping(prenominal) packing with the lattice parameters a = 526 pm. Like all the noble gases argo n has only unappealing shells (noble gas configuration). This can be explained that the mono-atomic gas always exists and in that location reactivity is low. With a assiduousness of 1.784 kg/m3 at 0 ° C argon is heavier than air, so it sinks. In the phase diagram of the triple point is 83.8 K and 0.689 bars, the critical point at 150.86 K, 4896 kPa and a critical immersion of 0.536 g/cm3.

Argon is reasonably soluble in water. One l of water at 0 ° C and 1 atmospheric pressure get out dissolve a maximum of 5.6 g of argon As a noble gas argon is immaterial and does non react very fast with other elemen ts or compounds. So far only one experimenta! lly indifferent(p) compound of argon is known. It is the Argonfluorohydrid harp, the by photolysis of hydrogen fluoride, which are obtained in an argon intercellular substance at 7.5 K and could be place by untested lines in the infrared spectrum. Above 27 K it decomposes.  gibe to theoretical calculations there should also be some other compounds of argon met stable and decompose relatively heavy. However, this was experimentally not been shown. Argon...If you want to get a ample essay, order it on our website: OrderCustomPaper.com

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