|
|
 |
|
|
|
|
| fran·ci·um [ fránssee əm ] |
noun |
|
| Definition: |
| |
unstable radioactive element: an unstable radioactive element of the alkali-metal group. Source: uranium ore, or made artificially from actinium and thorium.
Symbol Fr
|
| [Mid-20th century. After France, home of its discoverer] |
|
|
|
