రోడియం, 00Rh |
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| Pronunciation | (ROH-dee-əm) |
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| Appearance | silvery white metallic |
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| Group | group 9 |
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| Period | period 5 |
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| Block | |
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| Electrons per shell | 2, 8, 18, 16, 1 |
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| Phase at STP | solid |
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| Melting point | 2237 K (1964 °C, 3567 °F) |
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| Boiling point | 3968 K (3695 °C, 6683 °F) |
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| Density (near r.t.) | 12.41 g/cm3 |
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| when liquid (at m.p.) | 10.7 g/cm3 |
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| Heat of fusion | 26.59 kJ/mol |
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| Heat of vaporization | 494 kJ/mol |
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| Molar heat capacity | 24.98 J/(mol·K) |
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Vapor pressure
| P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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| at T (K)
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2288
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2496
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2749
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3063
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3405
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3997
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|
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| Oxidation states | −3[3], −1, 0, +1,[4] +2, +3, +4, +5, +6, +7[5] (an amphoteric oxide) |
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| Electronegativity | Pauling scale: 2.28 |
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| Atomic radius | empirical: 134 pm |
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| Covalent radius | 142±7 pm |
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| Natural occurrence | primordial |
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| Crystal structure | face-centered cubic (fcc) |
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| Speed of sound thin rod | 4700 m/s (at 20 °C) |
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| Thermal expansion | 8.2 µm/(m⋅K) (at 25 °C) |
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| Thermal conductivity | 150 W/(m⋅K) |
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| Electrical resistivity | 43.3 n Ω⋅m (at 0 °C) |
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| Magnetic ordering | paramagnetic[6] |
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| Young's modulus | 380 GPa |
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| Shear modulus | 150 GPa |
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| Bulk modulus | 275 GPa |
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| Poisson ratio | 0.26 |
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| Mohs hardness | 6.0 |
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| Vickers hardness | 1246 MPa |
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| Brinell hardness | 1100 MPa |
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| CAS Number | 7440-16-6 |
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| Discovery | William Hyde Wollaston (1804) |
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| First isolation | William Hyde Wollaston (1804) |
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| Template:infobox రోడియం isotopes does not exist |
 Category: రోడియం
| references |
References
These references will appear in the article, but this list appears only on this page.
- ↑ "Standard Atomic Weights: Rhodium". CIAAW. 2017.
- ↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
- ↑ Ellis J E. Highly Reduced Metal Carbonyl Anions: Synthesis, Characterization, and Chemical Properties. Adv. Organomet. Chem, 1990, 31: 1-51.
- ↑ "Rhodium: rhodium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10.
- ↑ Rh(VII) is known in the RhO3+ cation, see Da Silva Santos, Mayara; Stüker, Tony; Flach, Max; Ablyasova, Olesya S.; Timm, Martin; von Issendorff, Bernd; Hirsch, Konstantin; Zamudio‐Bayer, Vicente; Riedel, Sebastian; Lau, J. Tobias (2022). "The Highest Oxidation State of Rhodium: Rhodium(VII) in [RhO3]+". Angew. Chem. Int. Ed. 61 (38): e202207688. doi:10.1002/anie.202207688. PMC 9544489. PMID 35818987.
{{cite journal}}: CS1 maint: article number as page number (link)
- ↑ Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.
- ↑ "Rhodium: rhodium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10.
