 |
| Name |
argon |
| Symbol |
Ar |
| Atomic Weight |
39.948 |
| Atomic Number |
18 |
| CAS ID |
7440-37-1 |
| Group Number |
18 |
| Group Name |
Noble Gas |
| Period Number |
3 |
| Origin of Name |
Greek, argos = "inactive." |
| Year Discovered |
1894 |
| Discovery Credits |
Discovered by Lord Rayleigh (London) and Sir William Ramsay
(Bristol), UK |
| Class |
Non-metallic |
| Color |
Silvery White |
| Standard State |
Gas at 77 F & 298 K |
| Description |
Colorless, odorless gas comprising 1 percent of the atmosphere. Used as
inert atmosphere in lamps and high temperature metallurgy. Found in potassium-bearing minerals as a trapped gas due to the
radioactive decay of K40
|
Back to Elements Table Page
| |
