Rhenium

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Rhenium,  75Re
Rhenium single crystal bar and 1cm3 cube.jpg
General properties
Name, seembol rhenium, Re
Appearance sillery-white
Pronunciation /ˈrniəm/ REE-nee-əm
Rhenium in the periodic cairt
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline yird metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline yird metal)
Aluminium (post-transeetion metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline yird metal)
Scandium (transeetion metal)
Titanium (transeetion metal)
Vanadium (transeetion metal)
Chromium (transeetion metal)
Manganese (transeetion metal)
Airn (transeetion metal)
Cobalt (transeetion metal)
Nickel (transeetion metal)
Capper (transeetion metal)
Zinc (transeetion metal)
Gallium (post-transeetion metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline yird metal)
Yttrium (transeetion metal)
Zirconium (transeetion metal)
Niobium (transeetion metal)
Molybdenum (transeetion metal)
Technetium (transeetion metal)
Ruthenium (transeetion metal)
Rhodium (transeetion metal)
Palladium (transeetion metal)
Siller (transeetion metal)
Cadmium (transeetion metal)
Indium (post-transeetion metal)
Tin (post-transeetion metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline yird metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transeetion metal)
Tantalum (transeetion metal)
Tungsten (transeetion metal)
Rhenium (transeetion metal)
Osmium (transeetion metal)
Iridium (transeetion metal)
Platinum (transeetion metal)
Gold (transeetion metal)
Mercur (transeetion metal)
Thallium (post-transeetion metal)
Leid (post-transeetion metal)
Bismuth (post-transeetion metal)
Polonium (post-transeetion metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline yird metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transeetion metal)
Dubnium (transeetion metal)
Seaborgium (transeetion metal)
Bohrium (transeetion metal)
Hassium (transeetion metal)
Meitnerium (unkent chemical properties)
Darmstadtium (unkent chemical properties)
Roentgenium (unkent chemical properties)
Copernicium (transeetion metal)
Ununtrium (unkent chemical properties)
Flerovium (post-transeetion metal)
Ununpentium (unkent chemical properties)
Livermorium (unkent chemical properties)
Ununseptium (unkent chemical properties)
Ununoctium (unkent chemical properties)
Tc

Re

Bh
tungstenrheniumosmium
Atomic nummer (Z) 75
Group, block group 7, d-block
Period period 6
Element category   transeetion metal
Staundart atomic wicht (Ar) 186.207
Electron configuration [Xe] 4f14 5d5 6s2
per shell
2, 8, 18, 32, 13, 2
Pheesical properties
Phase solid
Meltin pynt 3459 K ​(3186 °C, ​5767 °F)
Bylin pynt 5869 K ​(5596 °C, ​10105 °F)
Density near r.t. 21.02 g/cm3
when liquid, at m.p. 18.9 g/cm3
Heat o fusion 60.43 kJ/mol
Heat o vapourisation 704 kJ/mol
Molar heat capacity 25.48 J/(mol·K)
vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 3303 3614 4009 4500 5127 5954
Atomic properties
Oxidation states 7, 6, 5, 4, 3, 2, 1, 0, -1
(mildly acidic oxide)
Electronegativity Pauling scale: 1.9
Ionisation energies
(mair)
Atomic radius empirical: 137 pm
Covalent radius 151±7 pm
Miscellanea
Creestal structur hexagonal close-packed (hcp)
Hexagonal close packed crystal structur for rhenium
Speed o soond thin rod 4700 m/s (at 20 °C)
Thermal expansion 6.2 µm/(m·K)
Thermal conductivity 48.0 W/(m·K)
Electrical resistivity 193 n Ω·m (at 20 °C)
Magnetic orderin paramagnetic[1]
Young's modulus 463 GPa
Shear modulus 178 GPa
Bouk modulus 370 GPa
Poisson ratio 0.30
Mohs haurdness 7.0
Vickers haurdness 2450 MPa
Brinell haurdness 1320 MPa
CAS Nummer 7440-15-5
History
Diskivery Masataka Ogawa (1908)
First isolation Masataka Ogawa (1908)
Named bi Walter Noddack, Ida Noddack, Otto Berg (1922)
Maist stable isotopes o rhenium
iso NA hauf-life DM DE (MeV) DP
185Re 37.4% - (α) 2.1947 181Ta
187Re 62.6% 4.12×1010 y α 1.653 183Ta
β 0.0026 187Os
Decay modes in parentheses are predictit, but hae nae yet been observed
· references

Rhenium is a chemical element wi the seembol Re an atomic nummer 75. It is a sillery-white, hivy, third-row transeetion metal in group 7 o the periodic table. Wi an estimatit average concentration o 1 pairt per billion (ppb), rhenium is ane o the rarest elements in the Yird's crust. The free element haes the third-heichest meltin pynt an heichest boilin pynt o ony element. Rhenium resembles manganese chemically an is obtained as a bi-product o molybdenum an copper ore's extraction an refinement. Rhenium shaws in its compoonds a wide variety o oxidation states rangin frae −1 tae +7.

References[eedit | eedit soorce]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.