Rhenium
75
Re
Gruppe
7
Periode
6
Blokk
d
Proton
Elektron
Nøytron
75
75
111
Generelle eigenskapar
Atomnummer
75
Atommasse
186,207
Massetal
186
Kategori
Transisjonsmetall
Farge
Grå
Radioaktiv
Nei
From the Latin word Rhenus meaning Rhine
Krystallstruktur
Enkel heksagonal
Historie
In 1908, Japanese chemist Masataka Ogawa announced that he discovered the 43rd element.
However, later analysis indicated the presence of rhenium (element 75), not element 43.
In 1922, Walter Noddack, Ida Eva Tacke and Otto Berg announced its separation from gadolinite and gave it the present name.
However, later analysis indicated the presence of rhenium (element 75), not element 43.
In 1922, Walter Noddack, Ida Eva Tacke and Otto Berg announced its separation from gadolinite and gave it the present name.
Elektron per energinivå
2, 8, 18, 32, 13, 2
Elektronkonfigurasjon
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
21,02 g/cm3
Smeltepunkt
3459,15 K | 3186 °C | 5766,8 °F
Kokepunkt
5869,15 K | 5596 °C | 10104,8 °F
Smeltevarme
33 kJ/mol
Fordampingsvarme
705 kJ/mol
Spesifikk varmekapasitet
0,137 J/g·K
Førekomst i jordskorpa
2,6×10-7%
Førekomst i universet
2×10-8%
Biletkreditering: Wikimedia Commons (Alchemist-hp)
A high purity rhenium single crystal made by the floating zone process, an ebeam remelted rhenium bar and as well as a high purity rhenium cube for comparison
CAS-nummer
7440-15-5
PubChem CID-nummer
23947
Atom eigenskapar
Atomradius
137 pm
Kovalent radius
151 pm
Elektronegativitet
1,9 (Paulings skala)
Ioniseringspotensial
7,8335 eV
Molart volum
8,85 cm3/mol
Termisk konduktivitet
0,479 W/cm·K
Oksidasjonstrinn
-3, -1, 1, 2, 3, 4, 5, 6, 7
Bruksområde
Rhenium is widely used as filaments for mass spectrographs and ion gauges.
It is also used with platinum as catalysts in the production of lead-free, high-octane gasoline.
Nickel-based superalloys of rhenium are used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
It is also used with platinum as catalysts in the production of lead-free, high-octane gasoline.
Nickel-based superalloys of rhenium are used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
Very little is known about the toxicity of rhenium
Isotopar
Stabile isotopar
185ReUstabile isotopar
160Re, 161Re, 162Re, 163Re, 164Re, 165Re, 166Re, 167Re, 168Re, 169Re, 170Re, 171Re, 172Re, 173Re, 174Re, 175Re, 176Re, 177Re, 178Re, 179Re, 180Re, 181Re, 182Re, 183Re, 184Re, 186Re, 187Re, 188Re, 189Re, 190Re, 191Re, 192Re, 193Re, 194Re