Renium
75
Re
Golongan
7
Periode
6
Blok
d
Proton
Elektron
Neutron
75
75
111
Sifat Umum
Nomor atom
75
Massa atom
186,207
Nomor massa
186
Kategori
Logam transisi
Warna
Abu-abu
Radioaktif
Tidak
From the Latin word Rhenus meaning Rhine
Struktur kristal
Segienam Sederhana
Sejarah
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.
Elektron per kulit
2, 8, 18, 32, 13, 2
Konfigurasi elektron
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Sifat Fisika
Fase
Solid
Kepadatan
21,02 g/cm3
Titik lebur
3459,15 K | 3186 °C | 5766,8 °F
Titik didih
5869,15 K | 5596 °C | 10104,8 °F
Kalor peleburan
33 kJ/mol
Kalor penguapan
705 kJ/mol
Kapasitas kalor molar
0,137 J/g·K
Kelimpahan di kerak bumi
2,6×10-7%
Kelimpahan di alam semesta
2×10-8%
Kredit Gambar: 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
Nomor CAS
7440-15-5
Nomor PubChem CID
23947
Sifat Atom
Jari-jari atom
137 pm
Jari-jari kovalen
151 pm
Elektronegativitas
1,9 (Skala Pauling)
Potensi Ionisasi
7,8335 eV
Volume atom
8,85 cm3/mol
Kondusivitas termal
0,479 W/cm·K
Bilangan oksidasi
-3, -1, 1, 2, 3, 4, 5, 6, 7
Aplikasi
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
Isotop
Isotop stabil
185ReIsotop tidak stabil
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