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| Atomic Number | 85 |
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| Atomic Symbol | At |
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| Atomic Weight | [210 amu] |
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| Group | Halogen, 17 |
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| Form | Solid |
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| Melting Point | 302 °C (575.6 °F, 575.15 °K) |
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| Heat of Fusion | 6 kJ/mol (approx.) |
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| Heat of Vaporization | 40 kJ/mol (approx.) |
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| Electronegativity (on Pauling scale) | 2.2 |
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| Ground State Electron Configuration | 5d10 6s2 6p5 |
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| Oxidation States | +1, +3, +5, +7, -1 |
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| Selected Radioisotopes | 210At, 211At |
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| Atomic Radius | 127 pm |
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| Discovered by | Corson; MacKenzie; Segre, 1940 |
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