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"Deep excursion beyond the proton dripline. "The AME2016 atomic mass evaluation (II). "The NUBASE2016 evaluation of nuclear properties" (PDF). n is the amount in moles of that substance. where: m is the mass of the substance in grams. ^ Half-life, decay mode, nuclear spin, and isotopic composition is sourced in:Īudi, G. By knowing the molar mass of a substance, having any mass of that substance allows one to know how many moles of it they have."Atomic weights of the elements 2013 (IUPAC Technical Report)". ^ "Standard Atomic Weights: Chlorine".In stoichiometric calculations, this value is often used as 58.44 g/mol. Therefore, the molar mass of sodium chloride will be. 1 mole of KClO 3 contains 1 mole of K 6.022×10 23 K atoms 1 mole of Cl. Isotope separation to produce pure 37Ĭl production, but a small amount might still be produced by (n,2n) reactions involving fast neutrons. A quick look in the periodic table and you'll see that the molar masses of sodium and chlorine, respectively, are. Although the standard SI unit for Molar Mass is kilogram per mol (kg/mol) it is. This produces a long lived radioactive product which has to be stored or disposed off. In chloride-based molten salt reactors the production of 36Ĭl by neutron capture is an inevitable consequence of using natural isotope mixtures of chlorine (i.e. 36Cl has seen use in other areas of the geological sciences, forecasts, and elements. Thus, as an event marker of 1950s water in soil and ground water, 36Cl is also useful for dating waters less than 50 years before the present. The residence time of 36Cl in the atmosphere is about 1 week. Additionally, large amounts of 36Cl were produced by neutron irradiation of seawater during atmospheric detonations of nuclear weapons between 19. The half-life of this hydrophilic nonreactive isotope makes it suitable for geologic dating in the range of 60,000 to 1 million years. 36Cl decays to either 36 S (1.9%) or to 36 Ar (98.1%), with a combined half-life of 308,000 years. The longest-lived radioactive isotope is 36 Cl, which has a half-life of 301,000 years. There are two stable isotopes, 35 Cl (75.77) and 37 Cl (24.23), giving chlorine a standard atomic weight of 35.45.
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In the subsurface environment, 36Cl is generated primarily as a result of neutron capture by 35Cl or muon capture by 40 Ca. Chlorine (17 Cl) has 25 isotopes with mass numbers ranging from 28 Cl to 52 Cl and 2 isomers (34m Cl and 38m Cl). 36Cl is produced in the atmosphere by spallation of 36 Ar by interactions with cosmic ray protons. Trace amounts of radioactive 36Cl exist in the environment, in a ratio of about 7×10 −13 to 1 with stable isotopes.