Rikki

Kemiallinen merkki: S
Järjestysluku: 16
Kategoria: epämetallit
Ryhmä: 16
Jakso: 3
Lohko: p
Moolimassa: 32,065 g/mol
Elektronia kuorilla: 2, 8, 6
CAS-numero: 7704-34-9
Olomuoto: kiinteä
Tiheys: 2,07 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 388,36 K (115,21 °C, 239,38 °F)
Kiehumispiste: 717,8 K (444,6 °C, 832,3 °F)
Kiderakenne: orthorhombic
Hapetusluvut: 6, 4, 2, 1, -2
Elektronegatiivisuus: 2,58 (Pauling-asteikko)
Nimen alkuperä: sulpur, sulphur or sulfur
Nimen tarkoitus: the Latin word for brimstone, the non- scientific name of the sulfur crystals
Faktoja:
- is a yellow crystalline solid
- it can be found as the pure element and as sulfide and sulfate minerals
- is an essential element for life and is found in two amino acids, cysteine and methionine
- is used primarily in fertilizers, but it is also widely used in black gunpowder, matches, insecticides and fungicides
- elemental sulfur crystals are commonly sought after by mineral collectors for their brightly colored polyhedron shapes
- has only a faint odor, similar to that of matches
- burns with a blue flame that emits sulfur dioxide, notable for its peculiar suffocating odor due to dissolving in the mucosa to form dilute sulfurous acid
- the compound hydrogen sulfide is toxic - although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until death or other symptoms occur