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beryllium
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A periodic table element box for beryllium displays its atomic number 4, symbol Be, atomic weight 9.0121831, electron configuration, and name. Icons indicate it is an alkaline-earth metal, solid at room temperature, with a hexagonal crystal structure and equal acid-base properties for higher-valence oxides. A key at the bottom explains the symbols. Explore an interactive periodic table of the elements Figure 12: The energy levels of three nuclei with A = 6, relative to the ground state of 6Li after subtraction of the calculated electrostatic energy. The isospin T = 1 levels exist in all three nuclei. decay of beryllium-7
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beryllium: References & Edit History

Article Contributors

Primary Contributors

  • Timothy P. Hanusa
    Professor, Department of Chemistry, Vanderbilt University, Nashville, Tennessee.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: National Center for Biotechnology Information - Beryllium and Beryllium Compounds. Oct 01, 2026
Add new Web site: Australian Government - Department of Climate Change, Energy, the Environment and Water - Beryllium and compounds. Jun 16, 2026
Add new Web site: Bhabha Atomic Research Centre - Beryllium: Associated Hazards, Safety Evolution and Safety Limits (PDF). Nov 04, 2025
Add new Web site: The University of Waikato - Research Commons - The chemistry and metallurgy of beryllium (PDF). Apr 04, 2024
Media added. Feb 22, 2024
Add new Web site: Canadian Center for Occupational Health and Safety - Beryllium - Health Effects. Sep 17, 2023
Add new Web site: Occupational Safety and Health Administration - Beryllium. Jul 28, 2023
Add new Web site: Chemistry LibreTexts - Chemistry of Beryllium (Z=4). Apr 21, 2023
Add new Web site: National Center for Biotechnology Information - Beryllium and Beryllium Compounds. Jan 26, 2023
Add new Web site: Energy.gov - Officie of Environmetal Management - Beryllium. Sep 29, 2022
Add new Web site: The Periodic Table - The Element Beryllium. May 28, 2021
Add new Web site: Live Science - Facts About Beryllium. May 28, 2021
Changed atomic weight from β€œ9.0122” to β€œ9.0121831.” Oct 26, 2020
Revised and updated the section Occurrence, properties, and uses. Feb 26, 2020
Add new Web site: Buzzle.com - Beryllium Use. Oct 30, 2013
Add new Web site: Royal Society of Chemistry - Beryllium. Oct 30, 2013
Text added noting top-producing countries of beryllium. Aug 23, 2013
Add new Web site: Chemicool - Beryllium. Jul 26, 2013
Add new Web site: EnvironmentalChemistry.com - Beryllium. Jul 26, 2013
Add new Web site: Rader's Chem4Kids.com - Beryllium. Jul 26, 2013
Add new Web site: WebElements - Beryllium. Jul 26, 2013
Article revised and updated. Dec 03, 2012
Added URL to topic: National Women's Hall of Fame - Biography of Marjory Stoneman Douglas. Aug 18, 2009
Article revised and updated. Apr 17, 2009
Article revised and updated. Oct 10, 2008
Added new Web site: Los Alamos National Laboratory's Chemistry Division - Beryllium. May 02, 2008
Added new Web site: Lenntech - Beryllium - Be. Sep 12, 2007
Article revised and updated. Apr 12, 2007
Article revised. Jan 29, 1999
Article added to new online database. Jul 20, 1998
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