Рениум

75
Re
Група
7
Периода
6
блок
d
Protons
Electrons
Neutrons
75
75
111
Општи Својства
Атомски број
75
Атомска тежина
186,207
Mass Number
186
Category
Преоден метал
Color
Gray
Radioactive
Не
From the Latin word Rhenus meaning Rhine
Кристална структура
Simple Hexagonal
History
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
Електронска конфигурација
[Xe] 4f14 5d5 6s2
Re
Chile has the world's largest rhenium reserves
Физички Својства
Фаза
Solid
Густина
21,02 g/cm3
Точка на топење
3459,15 K | 3186 °C | 5766,8 °F
Точка на вриење
5869,15 K | 5596 °C | 10104,8 °F
Топлина на топење
33 kJ/mol
Топлина на испарување
705 kJ/mol
Specific Heat Capacity
0,137 J/g·K
Abundance in Earth's crust
2,6×10-7%
Abundance in Universe
2×10-8%
A
Кредити на слика: 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
Атомски Својства
Атомски полупречник
137 pm
Ковалентен полупречник
151 pm
Електронегативност
1,9 (Полингова скала)
Ionization Potential
7,8335 eV
Atomic Volume
8,85 cm3/mol
Thermal Conductivity
0,479 W/cm·K
Oxidation States
-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