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Beryllium (4 Be) has 11 known isotopes and 3 known isomers, but only one of these isotopes (9 Be) is stable and a primordial nuclide. As such, beryllium is considered a monoisotopic element.
13 Σεπ 2017 · Beryllium (atomic number 4) has twelve isotopes, but only three are routinely measured: 7 Be, 9 Be, and 10 Be. 9 Be is a stable isotope that is found naturally in geological materials typically at μg g −1 levels and is considered in the Beryllium chapter.
12 isotopes or nuclides of the element beryllium are known, of which only one - 9 Be - is stable. This makes beryllium a pure element and the only monoisotopic chemical element with an even number of protons in the nucleus.
28 Φεβ 2020 · This table lists the known isotopes of beryllium, their half-life, and type of radioactive decay. The first entry corresponds to the nucleus where j=0 or the most stable isotope. Isotopes with multiple decay schemes are represented by a range of half-life values between the shortest and longest half-life for that type of decay.
Beryllium has but a single isotope, beryllium-9 which is not radioactive but beryllium-10, which cosmic rays produce in the upper atmosphere, is radioactive with a half-life of 1.5 million years.
30 Ιουν 2023 · Isotopes. Although beryllium has many isotopes, only 9 Be is stable, classifying it as a monoisotopic element. 10 Be is produced in the atmosphere when cosmic ray spallation of oxygen and nitrogen occurs. 10 Be resides on top of soil, and has a long half-life which allows it to survive a long time before turning into 10 B.
11 Οκτ 2024 · The only naturally occurring isotope is the stable beryllium-9, although 11 other synthetic isotopes are known. Their half-lives range from 1.5 million years (for beryllium-10, which undergoes beta decay) to 6.7 × 10 −17 second for beryllium-8 (which decays by two-proton emission).
