Tecken | Zn |
Atomnummer | 30 |
Grupp | 12 (Zinkgruppen) |
Period | 4 |
Block | d |
Ämnesklass | Övergångsmetall |
Utseende | Silver-gray |
Färg | Skiffer grå |
Antal protoner | 30 p+ |
Antal neutroner | 35 n0 |
Antal elektroner | 30 e- |
Fas vid STP | Fast |
Densitet | 7.14 g/cm3 |
Relativ atommassa | 65.382 u |
Smältpunkt | 692.68 K 419.53 °C 787.154 °F |
Kokpunkt | 1180 K 906.85 °C 1664.33 °F |
Ångbildningsvärme | 115.3 kJ/mol |
Elektronegativitet (Paulingskalan) | 1.65 |
Elektronaffinitet | -58 kJ/mol |
Oxidationstal | −2, 0, +1, +2 (an amphoteric oxide) |
Jonisationspotential |
|
Upptäckt | Indian metallurgists (1000 f.Kr.) |
Första isolation | Andreas Sigismund Marggraf (1746) |
Namngivare | Paracelsus |
Recognized as a unique metal by | Rasaratna Samuccaya (1300) |
Upptäckten av 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. |