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- Name : Beryllium
- Symbol : Be
- Atomic # : 4
- Atom weight: 9.01218
- Melting P. : 1278
- Boiling P. : 2970
- Oxidation : +2
- Pronounced : beh-RIL-i-em
- From : Greek beryllos, "beryl" (a mineral)
- Identified : Louis-Nicolas Vauquelin, 1798
- Appearance : Hard, brittle, steel-gray metal
- Note : Once known as glucinum, sweet tasting.
-
- [Properties]
-
- Beryllium metal is hard, brittle and steely gray. It is lighter than
- aluminum, but resembles it in many other ways. For example, an oxide
- coating develops rapidly on the metallic surfaces, thus preventing further
- oxidation.
- Beryllium heads the list of Group IIA elements commonly known as the
- alkaline-earth metals: magnesium (Mg), calcium (Ca), strontium (Sr),
- barium (Ba), and radium (Ra). The common name for this group is derived
- from theories and beliefs that prevailed prior to the early 1800s. Until
- that time, any element that did not obviously look, feel, and behave like
- a metal, and could not be dissolved in water was considered an earth
- element (from the ancient concept of the elements being earth, fire, and
- air). Any earth element that behaved like a common alkali, such as soda
- and potash, was considered an alkaline-earth metal. These views have
- since been abandoned in favor of more correct, precise, and comprehensive
- perspectives; nevertheless, the tradition remains alive in the common name
- of the Group IIA elements.
-