Rhenium
75
Re
Gruppe
7
Periode
6
Blokk
d
Protoner
Elektroner
Nøytroner
75
75
111
Generelle egenskaper
Atomnummer
75
Atomvekt
186,207
Massetall
186
Kategori
Transisjonsmetaller
Farge
Grå
Radioaktiv
Nei
From the Latin word Rhenus meaning Rhine
Krystallstruktur
Simple Hexagonal
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.
Elektroner per energinivå
2, 8, 18, 32, 13, 2
Elektronkonfigurasjon
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Fysikalske egenskaper
Fase
Fast stoff
Tetthet
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
Fordampningsvarme
705 kJ/mol
Spesifikk varmekapasitet
0,137 J/g·K
Forekomst i jordskorpa
2,6×10-7%
Forekomst i universet
2×10-8%
Bildekreditter: 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 Number
7440-15-5
PubChem CID Number
23947
Atomegenskaper
Atomradius
137 pm
Kovalent radius
151 pm
Elektronegativitet
1,9 (Pauling-skalaen)
Ioniseringsenergi
7,8335 eV
Molart volum
8,85 cm3/mol
Termisk ledningsevne
0,479 W/cm·K
Oksidasjonstilstander
-3, -1, 1, 2, 3, 4, 5, 6, 7
Bruksområder
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
Isotoper
Stabile isotoper
185ReUstabile isotoper
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