Nikkeli

Kemiallinen merkki: Ni
Järjestysluku: 28
Kategoria: siirtymämetallit
Ryhmä: 10
Jakso: 4
Lohko: d
Moolimassa: 58,6934 g/mol
Elektronia kuorilla: 2, 8, 16, 2
CAS-numero: 7440-02-0
Olomuoto: kiinteä
Tiheys: 8,91 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 1728 K (1453 °C, 2651 °F)
Kiehumispiste: 3186 K (2732 °C, 5275 °F)
Kiderakenne: cubic face centered
Hapetusluvut: 4, 3, 2, 1
Elektronegatiivisuus: 1,91 (Pauling-asteikko)
Nimen alkuperä: Nickel
Nimen tarkoitus: a mischievous sprite in German mythology who was blamed when miners were unable to extract any copper from a red mineral, now known as nickeline or niccolite
Faktoja:
- is a silvery-white lustrous metal with a slight golden tinge
- is one of the four ferromagnetic elements at about room temperature
- is corrosion-resistant, finding many uses in alloys, as a plating, in the manufacture of coins, magnets and common household utensils
- enzymes of certain life-forms contain nickel as an active center making the metal essential for them
- nickel sulfide fume and dust is believed to be carcinogenic, and various other nickel compounds may be as well
- ensitized individuals may show an allergy to nickel affecting their skin, also known as dermatitis