| Name | oxygen |
|---|---|
| Symbol | O |
| Atomic Weight | 15.9994 |
| Atomic Number | 8 |
| CAS ID | 7782-44-7 |
| Group Number | 16 |
| Group Name | Chalcogen |
| Period Number | 2 |
| Origin of Name | Greek, oxy genes = "acid forming." |
| Year Discovered | 1774 |
| Discovery Credits | J. Preistley at Leeds, UK, and independently by C. W. Scheele at Uppsala, Sweden. |
| Class | Non-Metallic |
| Color | Colorless as a gas, liquid is pale blue. |
| Standard State | Gas at 77 F & 298 K |
| Description | Colorless, odorless gas present in the
atmosphere. Very reactive and forms oxides of
all elements except He, Ne, Ar, and Kr. Moderately soluble in water (30.8
cc per liter) at 293 K. Used in steel making, metal cutting, chemical
industry. Diagnostic tests: |