| Barium | |
|---|---|
| Properties | |
| Atomic symbol | Ba |
| Atomic number | 56 |
| Classification | Standard Metal |
| Atomic mass | 137.3 amu |
| Other Information | |
| Date of discovery | 1808 |
| Name of discoverer | Sir Humphrey Davy |
| Name origin | From the Greek barys. |
| Uses | A barium meal is used in radiography to allow the alimentary canal to be viewed by x-ray. |
| Obtained from | Barytine or Whiterite. |