NOTICE: Citizendium is still being set up on its newer server, treat as a beta for now; please see here for more.
Citizendium - a community developing a quality comprehensive compendium of knowledge, online and free. Click here to join and contribute—free
CZ thanks our previous donors. Donate here. Treasurer's Financial Report -- Thanks to our content contributors. --


From Citizendium
Jump to: navigation, search
This article is a stub and thus not approved.
Main Article
Related Articles  [?]
Bibliography  [?]
External Links  [?]
Citable Version  [?]
MSDS [?]
Isotopes [?]
Properties [?]
This editable Main Article is under development and not meant to be cited; by editing it you can help to improve it towards a future approved, citable version. These unapproved articles are subject to a disclaimer.

[ ? ] Alkaline Earth Metal:
Steel-gray, low-density, brittle metal
Toxic, carcinogenic

Beryllium is a chemical element, having the chemical symbol Be. Its atomic number (the number of protons) is 4. It has a standard atomic weight of 9.012182 g•mol −1, and is typically found as a solid in its elemental form.

Beryllium is considered to be a member of the "Alkaline Earth Metal" class of element. At a pressure of 101.325 kPa, it has a boiling point of 2471 °C, and a melting point of 1287 °C

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),