Symbol | Zn |
Atomnummer | 30 |
Gruppe | 12 (Zinkgruppe) |
Periode | 4 |
Blok | d |
Klassifikation | Overgangsmetal |
Udseende | Silver-gray |
Farve | Skifergrå |
Antal protoner | 30 p+ |
Antal neutroner | 35 n0 |
Antal elektroner | 30 e- |
Fase ved STP | Fast |
Massefylde | 7.14 g/cm3 |
Atommasse | 65.382 u |
Smeltepunkt | 692.68 K 419.53 °C 787.154 °F |
Kogepunkt | 1180 K 906.85 °C 1664.33 °F |
Fordampningsvarme | 115.3 kJ/mol |
Elektronegativitet (Pauling Scale) | 1.65 |
Elektronaffinitet | -58 kJ/mol |
Oxidationstrin | −2, 0, +1, +2 (an amphoteric oxide) |
Ioniseringsenergier |
|
Opdaget | Indian metallurgists (1000 fvt.) |
Første isolation | Andreas Sigismund Marggraf (1746) |
Navngivet af | Paracelsus |
Recognized as a unique metal by | Rasaratna Samuccaya (1300) |
Opdagelse af zink Used as a component of brass since antiquity (before 1000 BC) by Indian metallurgists, but its true nature was not understood in ancient times. Identified as a distinct metal in the Rasaratna Samuccaya around the 14th century of the Christian era and by the alchemist Paracelsus in 1526. German chemist Andreas Marggraf normally gets credit for discovering pure metallic zinc 1746, even though Swedish chemist Anton von Swab had distilled zinc from calamine four years previously. |