Chemical element with atomic number 75 (Re)
Rhenium, 75 Re Pronunciation (REE -nee-əm Appearance silvery-grayish
Atomic number (Z ) 75 Group group 7 Period period 6 Block d-block Electron configuration [Xe ] 4f14 5d5 6s2 Electrons per shell 2, 8, 18, 32, 13, 2 Phase at STP solid Melting point 3459 K (3186 °C, 5767[ 3] Boiling point 5903[ 3] Density (at 20° C) 21.010 g/cm3 [ 4] when liquid (at m.p. ) 18.9 g/cm3 Heat of fusion 60.43 kJ/mol Heat of vaporization 704 kJ/mol Molar heat capacity 25.48 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
3303
3614
4009
4500
5127
5954
Oxidation states common: +4, +7 [ 5] [ 5] [ 6] [ 5] [ 5] [ 5] [ 5] [ 5] Electronegativity Pauling scale: 1.9 Ionization energies 1st: 760 kJ/mol 2nd: 1260 kJ/mol 3rd: 2510 kJ/mol (more ) Atomic radius empirical: 137 pm Covalent radius 151±7 pm Spectral lines of rheniumNatural occurrence primordial Crystal structure hexagonal close-packed (hcp) (hP2 ) Lattice constants a = 276.10 pmc = 445.84 pm (at 20 °C)[ 4] Thermal expansion × 10−6 [ a] Thermal conductivity 48.0 W/(m⋅K) Electrical resistivity 193 nΩ⋅m (at 20 °C) Magnetic ordering paramagnetic [ 7] Molar magnetic susceptibility × 10−6 3 /mol (293 K)[ 8] Young's modulus 463 GPa Shear modulus 178 GPa Bulk modulus 370 GPa Speed of sound thin rod 4700 m/s (at 20 °C) Poisson ratio 0.30 Mohs hardness 7.0 Vickers hardness 1350–7850 MPa Brinell hardness 1320–2500 MPa CAS Number 7440-15-5 Naming after the river Rhine (German: Rhein Discovery Masataka Ogawa (1908) First isolation Masataka Ogawa (1919) Named by Walter Noddack , Ida Noddack , Otto Berg (1925)
Category: Rhenium references
child table, as reused in {IB-Re}
^ "Standard Atomic Weights: Rhenium" . CIAAW . 1973.^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)" . Pure and Applied Chemistry . doi :10.1515/pac-2019-0603 . ISSN 1365-3075 . ^ a b Zhang, Yiming (2011-01-11). "Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks" . Journal of Chemical & Engineering Data . 56 . ^ a b c Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements . Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9 ^ a b c d e f g Greenwood, Norman N. ; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann . p. 28. ISBN 978-0-08-037941-8 ^ Re(0) is known in Re2 (CO)10 John E. Ellis (2006). "Adventures with Substances Containing Metals in Negative Oxidation States". Inorganic Chemistry . 45 (8). doi :10.1021/ic052110i .
^ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5 ^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 ^ a b Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF) . Chinese Physics C . 45 (3): 030001. doi :10.1088/1674-1137/abddae . Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page ).
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