Renij
75
Re
Skupina
7
Perioda
6
Blok
d
Protoni
Elektroni
Neutroni
75
75
111
Opća svojstva
Atomski broj
75
Relativna atomska masa
186,207
Maseni broj
186
Kategorija
Prijelazni metali
Boja
Siva
Radioaktivan
Ne
Od latinske riječi Rhenus, Rajna
Kristalna struktura
Jednostavna heksagonska
Povijest
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.
Elektrona po ljusci
2, 8, 18, 32, 13, 2
Elektronska konfiguracija
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Fizikalna svojstva
Agregacijsko stanje
Čvrsto
Gustoća
21,02 g/cm3
Talište
3459,15 K | 3186 °C | 5766,8 °F
Vrelište
5869,15 K | 5596 °C | 10104,8 °F
Toplina taljenja
33 kJ/mol
Toplina isparavanja
705 kJ/mol
Specifični toplinski kapacitet
0,137 J/g·K
Zastupljenost u Zemljinoj kori
2,6×10-7%
Zastupljenost u svemiru
2×10-8%
Izvor slike: 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 broj
7440-15-5
PubChem CID broj
23947
Atomska svojstva
Atomski radijus
137 pm
Kovalentni radijus
151 pm
Elektronegativnost
1,9 (Paulingova ljestvica)
Potencijal ionizacije
7,8335 eV
Atomski volumen
8,85 cm3/mol
Toplinska vodljivost
0,479 W/cm·K
Stanja oksidacije
-3, -1, 1, 2, 3, 4, 5, 6, 7
Primjene
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
Izotopi
Stabilni izotopi
185ReNestabilni izotopi
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