د ويکيپېډيا، وړیا پوهنغونډ له خوا
Neodymium, 60Nd |
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| Pronunciation | /ˌniː.oʊ-ˈdɪmiəm/
NEE-o-DIM-ee-əm |
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| Appearance | silvery white |
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| اټومي شمیره (Z) | 60 |
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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[۱] |
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| Electron configuration | [Xe] 4f4 6s2 |
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Electrons per shell | 2, 8, 18, 22, 8, 2 |
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| حالت (at STP) | جامد |
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| دويلې کيدو ټکى | 1297 K (1024 °C, 1875 °F) |
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| يشنا ټکی | 3347 K (3074 °C, 5565 °F) |
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| Density near r.t. | 7.01 g/cm3 |
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| when liquid, at m.p. | 6.89 g/cm3 |
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| Heat of fusion | 7.14 kJ/mol |
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| Heat of vaporization | 289 kJ/mol |
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| Molar heat capacity | 27.45 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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1595
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1774
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1998
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(2296)
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(2715)
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(3336)
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| Oxidation states | +4, +3, +2 (a mildly basic oxide) |
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| Electronegativity | Pauling scale: 1.14 |
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| Ionization energies | - 1st: 533.1 kJ/mol
- 2nd: 1040 kJ/mol
- 3rd: 2130 kJ/mol
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| Atomic radius | empirical: 181 pm |
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| Covalent radius | 201±6 pm |
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| Crystal structure | double hexagonal close-packed (dhcp) Double hexagonal close packed crystal structure for neodymium |
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| Speed of sound thin rod | 2330 m/s (at 20 °C) |
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| Thermal expansion | α, poly: 9.6 µm/(m·K) (at r.t.) |
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| د تودوخې تېرېدنه | 16.5 W/(m·K) |
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| Electrical resistivity | α, poly: 643 nΩ·m |
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| Magnetic ordering | paramagnetic, antiferromagnetic below 20 K[۲] |
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| Magnetic susceptibility (χmol) | +5628.0·10−6 cm3/mol (287.7 K)[۳] |
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| Young's modulus | α form: 41.4 GPa |
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| Shear modulus | α form: 16.3 GPa |
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| Bulk modulus | α form: 31.8 GPa |
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| Poisson ratio | α form: 0.281 |
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| Vickers hardness | 345–745 MPa |
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| Brinell hardness | 265–700 MPa |
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| CAS Number | 7440-00-8 |
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| Discovery | Carl Auer von Welsbach (1885) |
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| | references | in Wikidata |
نيوديموميم (په انگرېزي: Neodymium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Nd سمبول او ۶۰ اتمي شمېرې په وسیله ښودل شوی دی.
- ↑ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure Appl. Chem. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
- ↑ Gschneidner, K. A.; Eyring, L. (1978). Handbook on the Physics and Chemistry of Rare Earths. Amsterdam: North Holland. ISBN 0444850228.
- ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
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 دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.
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