Kadmium

Kemiallinen merkki: Cd
Järjestysluku: 48
Kategoria: siirtymämetallit
Ryhmä: 12
Jakso: 5
Lohko: d
Moolimassa: 112,411 g/mol
Elektronia kuorilla: 2, 8, 18, 18, 2
CAS-numero: 7440-43-9
Olomuoto: kiinteä
Tiheys: 8,65 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 594,22 K (321,07 °C, 609,93 °F)
Kiehumispiste: 1040 K (767 °C, 1413 °F)
Kiderakenne: hexagonal
Hapetusluvut: 1, 2
Elektronegatiivisuus: 1,69 (Pauling-asteikko)
Nimen alkuperä: Cadmus
Nimen tarkoitus: a mythological character in Greek
Faktoja:
- is a soft, bluish-white transition metal
- is a relatively abundant element
- was discovered in 1817 by Friedrich Strohmeyer as an impurity in zinc carbonate
- was for a long time used as pigment and for corrosion resistant plating on steel
- with the exception of its use in nickel-cadmium batteries, the use of cadmium is generally decreasing in all other applications
- is considered highly toxic and carcinogenic
- although cadmium is toxic, one enzyme, a carbonic anhydrase with a
- in 2001, China was the top producer of cadmium with almost one-sixth world share closely followed by South Korea and Japan