Francium
| Basic: |
| Francium is a type of unalloyed metal and radioactive substance. |
| Documentation: |
| Comment: A piece (i.e., specific collections of nearby molecules) of francium; typically, these will be tightly bound into solid form. |
| Miscellaneous: |
| The atomic number of francium is 87. A possible valence of francium is 1. The atomic weight of francium is 223 atomic mass units. Francium is named after France. |