Atomic Weight of Boron | 合法醫療器材資訊網
Underthe1983policyofamoreliberaluseofanysingle-digituncertainty,theCommissionchangedtherecommendedstandardatomicweighttoAr(B)=10.811(5).
Isotope Atomic mass (Da) Isotopic abundance (amount fraction) 10B 10.012 9369(1) [0.189, 0.204] 11B 11.009 305 17(8) [0.796, 0.811]In 1961, the Commission recommended Ar(B) = 10.811(3) based on calibrated mass-spectrometric measurements on brines and minerals from Searles Lake. The uncertainty was based on reported variations in natural abundances. In 1981, the Commission concluded that the range of isotope-abundance variations typical of the most common sources is covered by Ar(B) = 10.811(2). This value includes major commercial sources of boron in California and Turkey. However, the existence of normal terrestr...
#5 | 合法醫療器材資訊網
2019 Atomic Weights | 合法醫療器材資訊網
4.9 | 合法醫療器材資訊網
Atomic Weight of Boron | 合法醫療器材資訊網
Atomic Weights and Isotopic Compositions for Boron | 合法醫療器材資訊網
Boron - Element information | 合法醫療器材資訊網
Boron | 合法醫療器材資訊網
Boron-11 | 合法醫療器材資訊網
Isotopes of boron | 合法醫療器材資訊網
The Elements | 合法醫療器材資訊網
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