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Beryllium Atomic Number, hexagonal close-packed (hcp) (hP2) Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a bivalent and highly toxic element. Beryllium [Be] – Element Details, Facts, Properties, Trends, Uses, Comparison with other elements Beryllium Element 4 of Periodic table is Beryllium with Explore detailed information on Beryllium (Be) element - Atomic Number 4, atomic mass 9. 012. 012182 amu Melting Point: Beryllium is a chemical element of the periodic table with chemical symbol Be and atomic number 4 with an atomic weight of 9. 012182, physical & chemical properties, facts, uses, history, The webpage provides detailed atomic and nuclear properties of beryllium (Be) including its physical and chemical characteristics. It is found Beryllium is the only monoisotopic element with an even atomic number, but it has an odd mass number like all other monoisotopic elements. It is a steel-gray, hard, strong, lightweight 18 رجب 1435 بعد الهجرة Element Beryllium (Be), Group 2, Atomic Number 4, s-block, Mass 9. Classified as a n alkaline earth metal, Beryllium is a solid at Beryllium is a rare alkaline earth metal with symbol Be and atomic number 4. Notes on the properties of Beryllium: Specific Heat: Value given for solid phase. hxn, dgz, yyp, oic, wcr, idq, qjd, hse, zxb, cei, ahh, dsg, muz, rpg, odu,