| Symbol | Sb |
| Atomnummer | 51 |
| Gruppe | 15 (Kvælstof-fosfor-gruppe) |
| Periode | 5 |
| Blok | p |
| Klassifikation | Halvmetal |
| Udseende | Silvery lustrous gray |
| Farve | Sølv |
| Antal protoner | 51 p+ |
| Antal neutroner | 71 n0 |
| Antal elektroner | 51 e- |
| Fase ved STP | Fast |
| Massefylde | 6.697 g/cm3 |
| Atommasse | 121.76 u |
| Smeltepunkt | 903.78 K 630.63 °C 1167.134 °F |
| Kogepunkt | 1908 K 1634.85 °C 2974.73 °F |
| Fordampningsvarme | 67.97 kJ/mol |
| Elektronegativitet (Pauling Scale) | 2.05 |
| Elektronaffinitet | 101.059 kJ/mol |
| Oxidationstrin | −3, −2, −1, 0, +1, +2, +3, +4, +5 (an amphoteric oxide) |
| Ioniseringsenergier |
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| Opdaget | Jabir ibn Hayyan (815) |
Opdagelse af antimon Dioscorides and Pliny both describe the accidental production of metallic antimony from stibnite, but only seem to recognize the metal as lead. The intentional isolation of antimony is described in the works attributed to the Muslim alchemist Jabir ibn Hayyan (c. 850–950). In Europe, the metal was being produced and used by 1540, when it was described by Vannoccio Biringuccio. The first discovery of naturally occurring pure antimony in the Earth's crust was described by the Swedish scientist and local mine district engineer Anton von Swab in 1783; the type-sample was collected from the Sala Silver Mine in the Bergslagen mining district of Sala, Västmanland, Sweden. | |