Rhenium

75
Re
Grupp
7
Period
6
Block
d
Protoner
Electrons
Neutroner
75
75
111
Generella Egenskaper
Atomnummer
75
Atommassa
186,207
Mass Number
186
Kategori
Övergångsmetaller
Färg
Grå
Radioaktiv
Nej
From the Latin word Rhenus meaning Rhine
Kristallstruktur
Enkelt hexagonalt
Historia
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.
Elektroner per skal
2, 8, 18, 32, 13, 2
Elektronkonfiguration
[Xe] 4f14 5d5 6s2
Re
Chile has the world's largest rhenium reserves
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
21,02 g/cm3
Smältpunkt
3459,15 K | 3186 °C | 5766,8 °F
Kokpunkt
5869,15 K | 5596 °C | 10104,8 °F
Smältvärme
33 kJ/mol
Ångbildningsvärme
705 kJ/mol
Specifik värmekapacitet
0,137 J/g·K
Abundance in Earth's crust
2,6×10-7%
Abundance in Universe
2×10-8%
A
Bildkrediter: 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
Atomära Egenskaper
Atomradie
137 pm
Kovalent radie
151 pm
Elektronegativitet
1,9 (Paulingskalan)
Jonisationspotential
7,8335 eV
Molvolym
8,85 cm3/mol
Värmeledningsförmåga
0,479 W/cm·K
Oxidationstillstånd
-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
Isotoper
Stabila isotoper
185Re
Instabila 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