Renij
75
Re
Skupina
7
Perioda
6
Blok
d
Protoni
Elektroni
Nevtroni
75
75
111
Splošne lastnosti
Vrstno število
75
Atomska teža
186,207
Masno število
186
Kategorija
Prehodne kovine
Barva
Siva
Radioaktivno
Ne
From the Latin word Rhenus meaning Rhine
Kristalna struktura
Heksagonalna
Zgodovina
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.
Elektroni po lupinah
2, 8, 18, 32, 13, 2
Razporeditev elektronov
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Fizikalne lastnosti
Faza snovi
Trdnina
Gostota
21,02 g/cm3
Tališče
3459,15 K | 3186 °C | 5766,8 °F
Vrelišče
5869,15 K | 5596 °C | 10104,8 °F
Talilna toplota
33 kJ/mol
Izparilna toplota
705 kJ/mol
Toplotna kapaciteta
0,137 J/g·K
Zastopanost v Zemljini skorji
2,6×10-7%
Zastopanost v vesolju
2×10-8%
Zasluge za 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 številka
7440-15-5
PubChem CID številka
23947
Atomske lastnosti
Atomski polmer
137 pm
Kovalentni polmer
151 pm
Elektronegativnost
1,9 (Paulingova lestvica)
Ionizacijski potencial
7,8335 eV
Atomski volumen
8,85 cm3/mol
Toplotna prevodnost
0,479 W/cm·K
Oksidacijska stanja
-3, -1, 1, 2, 3, 4, 5, 6, 7
Uporabe
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