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Date: 12-3-2017
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Date: 25-1-2019
1070
Date: 20-12-2018
1278
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A neon compound is still yet to be theoretically identified although the gas phase ions like NeAr+, NeH+, HeNe+have been resolved from mass spectrometry studies.
The average atomic mass of neon is 20.1797 u. Neon is known to have over nineteen different isotopes ranging from 16-34 in isotopic mass. However, neon only has three stable isotopes: 20Ne, 21Ne, and 22Ne. The most abundant of those stable isotopes (no t1/2 or decay) is 20Ne at about 90% via alpha decay of Mg-25 to form Ne-21.
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تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
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أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
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قسم شؤون المعارف ينظم دورة عن آليات عمل الفهارس الفنية للموسوعات والكتب لملاكاته
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