Beryllium
Properties, Uses, & Facts
beryllium (Be), formerly (until 1957) glucinium, chemical element, the lightest member of the alkaline-earth metals of Group 2 (IIa) of the periodic table, used in metallurgy as a hardening agent and in many outer space and nuclear applications.
| atomic number | 4 |
|---|---|
| atomic weight | 9.0121831 |
| melting point | 1,287 °C (2,349 °F) |
| boiling point | 2,471 °C (4,480 °F) |
| specific gravity | 1.85 at 20 °C (68 °F) |
| oxidation state | +2 |
| electron configuration | 1s22s2 |
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