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| عمومي خواص |
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| Pronunciation | /jʊˈroʊpiəm/
ew-ROH-pee-əm |
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| Appearance | silvery white, with a pale yellow tint;[۱] but rarely seen without oxide discoloration |
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| Europium پهدوراني جدول کې |
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| اټومي شمیره(Z) | 63 |
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| گروپ,پیریود | group n/a,period 6 |
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| بلاک | f-block |
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| Element category | lanthanide |
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| معياري اټومي وزن (Ar) | کينډۍ:Val[۲] |
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| Electron configuration | [Xe] 4f7 6s2 |
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Electrons per shell | 2, 8, 18, 25, 8, 2 |
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| فزیکي خواص |
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| حالت(at STP) | جامد |
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| دويلې کيدو ټکى | 1099 K (826 °C, 1519 °F) |
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| يشنا ټکی | 1802 K (1529 °C, 2784 °F) |
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| Density near r.t. | 5.264 g/cm3 |
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| when liquid, at m.p. | 5.13 g/cm3 |
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| Heat of fusion | 9.21 kJ/mol |
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| Heat of vaporization | 176 kJ/mol |
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| Molar heat capacity | 27.66 J/(mol·K) |
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| Vapor pressure |
| اټومي خواص |
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| Oxidation states | 3,2, 1 (a mildlybasic oxide) |
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| Electronegativity | Pauling scale: 1.2 |
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| Ionization energies | - 1st: 547.1 kJ/mol
- 2nd: 1085 kJ/mol
- 3rd: 2404 kJ/mol
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|
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| Atomic radius | empirical: 180 pm |
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| Covalent radius | 198±6 pm |
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| Miscellanea |
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| Crystal structure | body-centered cubic (bcc) Body-centered cubic crystal structure for europium |
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| Thermal expansion | poly: 35.0 µm/(m·K) (atr.t.) |
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| د تودوخې تېرېدنه | est. 13.9 W/(m·K) |
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| Electrical resistivity | poly: 0.900 µΩ·m (atr.t.) |
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| Magnetic ordering | paramagnetic[۳] |
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| Magnetic susceptibility(χmol) | +34,000.0·10−6 cm3/mol[۴] |
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| Young's modulus | 18.2 GPa |
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| Shear modulus | 7.9 GPa |
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| Bulk modulus | 8.3 GPa |
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| Poisson ratio | 0.152 |
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| Vickers hardness | 165–200 MPa |
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| CAS Number | 7440-53-1 |
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| History |
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| Naming | afterEurope |
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| Discovery and first isolation | Eugène-Anatole Demarçay (1896, 1901) |
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| Mainisotopes of europium |
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|
| | references | in Wikidata |
