Astatine
(Redirected from At)
| Astatine | |
|---|---|
| At | |
| In situ availability: | |
| Necessity: | |
| Atomic number: | 85 |
| Atomic mass: | [210] |
| group: | 17 |
| period: | 6 |
| normal phase: | Solid |
| series: | Halogens |
| density: | No data |
| melting point: | 575K, 302°C, 576°F |
| boiling point: | |
| Te ← I → Xe | |
| Po ← At → Rn | |
| Uuh ← Uus → Uuo | |
| 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 6p5 | |
| Electrons Per Shell | |
| 2, 8, 18, 32, 18, 7 | |
| Electronegativity: | 2.2 |
| Electron Affinity: | 2.8 |
| Oxidation states: | +/-1, 3, 5, 7 |
| Magnetism: | ? |
| Crystal structure: | |
Astatine is a Halogen in group 17.
It does not have any isotopes considered to be natural. Its longest-lived known isotope has an atomic number of 210.
This element has no stable isotopes.
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