Renium

Kemiallinen merkki: Re
Järjestysluku: 75
Kategoria: siirtymämetallit
Ryhmä: 7
Jakso: 6
Lohko: d
Moolimassa: 186,207 g/mol
Elektronia kuorilla: 2, 8, 18, 32, 13, 2
CAS-numero: 7440-15-5
Olomuoto: kiinteä
Tiheys: 21,02 kg/l (lähellä huoneenlämpöä)
Sulamispiste: 3459 K (3186 °C, 5767 °F)
Kiehumispiste: 5869 K (5596 °C, 10105 °F)
Kiderakenne: hexagonal
Hapetusluvut: 7, 6, 5, 4, 3, 2, 1, -1, -2, -3
Elektronegatiivisuus: 1,9 (Pauling-asteikko)
Nimen alkuperä: Rhenus (Latin)
Nimen tarkoitus: Rhine, the name of the river which flows through the country where rhenium was found: Germany
Faktoja:
- in 1908 a Japanese chemist Masataka Ogawa announced that he discovered the 43rd element, and named it nipponium (Np) after Japan (which is Nippon in Japanese) - however, later analysis indicated the presence of rhenium (element 75), not e
- is a silvery white metal with one of the highest melting points of all elements
- is probably not found free in nature
- is used in high-temperature superalloys that are used to make jet engine parts, making 70% of the worldwide production