Francium
| Francium | |
|---|---|
| Fr | |
| In situ availability: | unavailable |
| Necessity: | |
| Atomic number: | 87 |
| Atomic mass: | [223] |
| group: | 1 |
| period: | 7 |
| normal phase: | Solid |
| series: | Alkali metals |
| density: | 1.87 g/cm3 |
| melting point: | |
| boiling point: | |
| N/A ← Cs → Ba | |
| Rn ← Fr → Ra | |
| N/A ← N/A → N/A | |
| Atomic radius (pm): | |
| Bohr radius (pm): | |
| Covalent radius (pm): | |
| Van der Waals radius (pm): | |
| ionic radius (pm): | - |
| 1st ion potential (eV): | - |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 7s1 | |
| Electrons Per Shell | |
| 2, 8, 18, 32, 18, 8, 1 | |
| Electronegativity: | 0.7 |
| Electron Affinity: | 0.46 |
| Oxidation states: | 1 |
| Magnetism: | ? |
| Crystal structure: | Body centered cubic |
Francium is a Alkali metal in group 1.
It has a Body centered cubic crystalline structure.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 223.
This element has no stable isotopes.
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