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Tri Phan 28/9/11 Per 4 atomic number 18 Argon is a chemic part represented by the symbolism Ar. Argon has nuclear number 18 and is the third element in convocation 18 of the periodic table ( dread(a) gases). Argon is the third about common gas in the earth atmosphere, at 0.93%, qualification it more common than ampere-second 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, creation the preferred argon isotope produced by stellar nucleus implication in supernovas. Argon is dull in the solid and mobile state Argon is a mono-atomic, under standard conditions, dull and odorless gas, which at 87.3 K (-185.8 ° C) and condensed at 83.6 K (-189.3 ° C) frozen. manage the different noble gases pull out helium argon crystallizes in a cubic enveloping(prenominal) packing with the lattice parameters a = 526 pm. Like all the noble gas es argon has only disagreeable shells (noble gas configuration). This can be explained that the mono-atomic gas always exists and thither 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 draw 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 slightly soluble in water. One l of water at 0 ° C and 1 atmospheric pressure will dissolve a maximum of 5.6 g of argon As a noble gas argon is immaterial and does non react very fast with other elements or compo unds. So far only one experimentally indiff! erent(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 refreshing lines in the infrared spectrum. Above 27 K it decomposes.  concord 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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