Beryllium: Difference between revisions
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imported>Mark Widmer (Added density value.) |
imported>Mark Widmer (Opening paragraph revised to match new standard: Typical phase (gas/liq/sol), symbol, Z, and std. atomic weight.) |
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'''Beryllium''' is a [[Chemical elements|chemical element]], typically found as a [[Solid_(state_of_matter)|solid]] in its elemental form. It has the [[chemical symbol]] Be, [[atomic number]] (number of [[protons]]) ''Z'' = 4, and a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 9.012182 g/mol. | |||
Beryllium is considered to be a member of the "Alkaline Earth Metal" class of elements. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] of 2471 °[[Celsius (unit)|C]], and a [[melting point]] of 1287 °C. Its density is 1.85 g/cc. | |||
Beryllium is considered to be a member of the "Alkaline Earth Metal" class of | |||
Beryllium is toxic to living organisms. | Beryllium is toxic to living organisms. | ||
It is a strategic material in nuclear weapons, specifically acting as a [[fission device#neutron reflection|neutron reflector]] surrounding the fission core, increasing its neutron density, and decreasing the size of the device. A [[beryllium reflector]] was first used operationally in the U.S. [[Mark 12 (nuclear weapon)]], | It is a strategic material in nuclear weapons, specifically acting as a [[fission device#neutron reflection|neutron reflector]] surrounding the fission core, increasing its neutron density, and decreasing the size of the device. A [[beryllium reflector]] was first used operationally in the U.S. [[Mark 12 (nuclear weapon)]], | ||
Latest revision as of 19:35, 31 December 2020
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Beryllium is a chemical element, typically found as a solid in its elemental form. It has the chemical symbol Be, atomic number (number of protons) Z = 4, and a standard atomic weight of 9.012182 g/mol.
Beryllium is considered to be a member of the "Alkaline Earth Metal" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 2471 °C, and a melting point of 1287 °C. Its density is 1.85 g/cc.
Beryllium is toxic to living organisms.
It is a strategic material in nuclear weapons, specifically acting as a neutron reflector surrounding the fission core, increasing its neutron density, and decreasing the size of the device. A beryllium reflector was first used operationally in the U.S. Mark 12 (nuclear weapon),