Renij

75
Re
Skupina
7
Perioda
6
Blok
d
Protons
Electrons
Neutrons
75
75
111
General Properties
Vrstno število
75
Atomska teža
186,207
Mass Number
186
Kategorija
Prehodne kovine
Barva
Gray
Radioactive
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.
Electrons per shell
2, 8, 18, 32, 13, 2
Razporeditev elektronov
[Xe] 4f14 5d5 6s2
Re
Chile has the world's largest rhenium reserves
Physical Properties
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
Abundance in Earth's crust
2,6×10-7%
Abundance in Universe
2×10-8%
A
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 Number
7440-15-5
PubChem CID Number
23947
Atomic Properties
Atomski polmer
137 pm
Kovalentni polmer
151 pm
Elektronegativnost
1,9 (Paulingova lestvica)
Ionization Potential
7,8335 eV
Atomic Volume
8,85 cm3/mol
Toplotna prevodnost
0,479 W/cm·K
Oksidacijska stanja
-3, -1, 1, 2, 3, 4, 5, 6, 7
Applications
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.
Very little is known about the toxicity of rhenium
Isotopes
Stable Isotopes
185Re
Unstable Isotopes
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