Francium
| Latin name | Francium |
| English name | Francium |
| chemical symbol | Fr |
| atomic number | 87 |
| relative atomic mass | (223,0197) |
| period | 7 |
| group | I.A |
| classification | alkali metals |
| discovery year | 1939 |
| discoverer | Marguerite Perey |
| melting point [°C] | 27 |
| boiling point [°C] | 677 |
| density [g cm-3] | 1,873 |
| electronegativity [Pauling] | 0,7 |
| oxidation states | I |
| electron configuration | [Rn]7s1 |
| thermal conductivity [W m-1 K-1] | 3,61 |
| state at normal conditions | solid |
Resources
- Francium. In: Radiochemistry Society [online]. 2003 [cit. 2012-12-11]. Available fröm: http://www.radiochemistry.org/
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