| SYMBOL | 0 |
|
| ATOMIC NUMBER | 8 |
| ATOMIC WEIGHT | 15.999 |
| GROUP NUMBER | 16 |
| STANDARD STATE | GAS |
| COLOUR | COLOURLESS (GAS), BLUE (LIQUID) |
| DISCOVERED | 1774 BY SCHEELE AND PRIESTLY IN SWEDEN AND ENGLAND |
| ORIGIN OF NAME | FROM THE GREEK OXY GENES MEANING ACID FORMING |
| USES |
- IN OXY ACETYLENE WELDING.
- RESPIRATION.
- ROCKET FUEL OXIDANT.
- IN STEEL MANUFACTURING.
- FORMING OZONE IN THE OZONE LAYER WHICH PROTECTS US FROM THE SUN'S HARMFUL U.V. RAYS.
|
| ATOMIC RADIUS | 0.66 * 10-10M |
| COMPOUNDS |
- O(-II) H2O, H30+, OH- AND OTHER OXIDES.
- O(-I) H2O2 AND OTHER PEROXIDES.
- O(0) NH2OH.
- O(O) 02 AND O3.
- O(I) O2F3.
- O(II) OF2.
|
| EFFECTIVE NUCLEAR CHARGE (Slater) | 4.55 |
| DENSITY | 2000 KgM-3(SOLID AT M.P.), 1140 KgM-3 (LIQUID AT B.P.), 1.429 KgM-3(GAS AT 273K) |
| MELTING POINT | 54.8 K |
| BOILING POINT | 90.188 K |
| ENTHALPY OF FUSION | 0.444 KJMol-1 |
| ENTHALPY OF VAPOURISATION | 6.82 KJMol-1 |
| ISOTOPES | 0-14 (Radioactive), O-15 (Radioactive), 0-16, 0-17, 0-18 |
| ELECTRON CONFIGURATION | 1S22S22P4 |
| FIRST IONISATION ENERGY | 1313.9 KJMol-1 |
| ELECTRON AFFINITY | 141 KJMol-1 |
| SOURCES | THE ATMOSTPHERE |
| GENERAL INFORMATION | OXYGEN IS A PARAMAGNETIC LIQUID AND IS VERY REACTIVE, COMBINING WITH MOST ELEMENTS. IT IS ESSENTIAL FOR COMBUSTION AND RESPIRATION AND, IN ITS EXCITED STATES, IS RESPONSIBLE FOR THE COLOURS SEEN IN THE AURORA |
OXYGEN