| SYMBOL | Be |
|
| ATOMIC NUMBER | 4 |
| ATOMIC WEIGHT | 9.0122 |
| GROUP NUMBER | 2 |
| STANDARD STATE | SOLID |
| COLOUR | GREY |
| DISCOVERED | 1797 BY N - L VAUQUELIN IN FRANCE |
| ORIGIN OF NAME | FROM THE GREEKBERYLLOS MEANING BERYL |
| USES |
- MODERATOR IN NUCLEAR REACTORS
- ALLOYING AGENT FOR MAKING BERYLLIUM COPPER (USED IN SPRINGS, ELECTRICAL CONTACTS ETC.)
- STRUCTURAL MATERIAL FOR HIGH SPEED AIRCRAFTS, MISSILES, SPACECRAFTS AND SATALLITES
- GYROSCOPES AND COMPUTER PARTS AS LIGHT, STIFF AND DIMENTIONALLY STABLE
- BERYLLIUM OXIDE IS USED IN THE NUCLEAR INDUSTRY
- CERAMICS
- X - RAY WINDOWS
- NON SPARKING TOOLS
|
| ATOMIC RADIUS | 1.13 * 10-10M |
| COMPOUNDS |
- Be(II) BeO, Be(OH)2, BeH2, BeF2, BeCO3, BeCl2, [Be(H2O)4]2+ AND OTHER SALTS
- BERYLLIUM OXIDE IS THE MINERALS AQUAMARINE AND BERYL
|
| EFFECTIVE NUCLEAR CHARGE (Slater) | 1.95 |
| DENSITY | 1847.7 KgM-3 |
| MELTING POINT | 155 K |
| BOILING POINT | 3243 K (UNDER PRESSURE) |
| ENTHALPY OF FUSION | 9.80 KJMol-1 |
| ENTHALPY OF VAPOURISATION | 308.8 KJMol-1 |
| ISOTOPES | Be-6, Be-7, Be-8, Be-9, Be-10, Be-11, Be-12, Be-13 ALL RADIOACTIVE EXCEPT Be-9 |
| ELECTRON CONFIGURATION | 1S22S2 |
| FIRST IONISATION ENERGY | 899.4 KJMol-1 |
| ELECTRON AFFINITY | -18 KJMol-1 |
| SOURCES | MINED IN BRAZIL, U.S.A., MADAGASCAR, INDIA, GERMANY, RUSSIA AND THE CZECH REPUBLIC |
| GENERAL INFORMATION | A LAYER OF OXIDE WHICH FORMS ON ITS SURFACE ENABLES IT TO SCRATCH GLASS |
BERYLLIUM