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Properties and data of the isotope 9 Be. Beryllium-9 is an isotope of the chemical element Beryllium, which, in addition to the element-specific 4 protons, has 5 neutrons in the atomic nucleus, resulting in the mass number 9. 9 Be is a primordial nuclide on Earth and the only stable nuclide of beryllium; It is therefore a monoisotopic element.

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.

Jul 1, 2009 · Beryllium-9 is the stable isotope of beryllium with relative atomic mass 9.012182, 100 atom percent natural abundance and nuclear spin 3/2.

Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a steel-gray, hard, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally only in combination with other elements to form minerals. Gemstones high in beryllium include beryl (aquamarine, emerald, red beryl) and chrysoberyl.

Beryllium-9 is the only stable isotope found on earth. The smallest traces of the radioactive nuclides 7 Be and 10 Be can be detected as radioisotopes of cosmic origin.

Detailed decay information for the isotope beryllium-9 including decay chains and daughter products.

May 8, 2025 · 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 …

Feb 28, 2020 · Beryllium forms in stars, but the radioactive isotopes don't last long. Primordial beryllium consists entirely of the one stable isotope, beryllium-9. Beryllium is a mononuclidic and monoisotopic element. Beryllium-10 is produced by cosmic ray spallation of …

beryllium-9: ChEBI ID CHEBI:52628: Definition The stable isotope of beryllium with relative atomic mass 9.012182, 100 atom percent natural abundance and nuclear spin 3/2. Stars This entity has been manually annotated by the ChEBI Team.

Element Beryllium (Be), Group 2, Atomic Number 4, s-block, Mass 9.012. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.