نيوديموميم

Neodymium, ₆₀Nd
عمومي خواص
Pronunciation	/ˌniː.oʊ-ˈdɪmiəm/ ; NEE-o-DIM-ee-əm
Appearance	silvery white
Neodymium په دوراني جدول کې
praseodymium ← neodymium → promethium	‍
اټومي شمیره (Z)	60
گروپ, پیریود	group n/a, period 6
بلاک	f-block
Element category	lanthanide
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Xe] 4f4 6s2
Electrons per shell	2, 8, 18, 22, 8, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1297 K (1024 °C, 1875 °F)
يشنا ټکی	3347 K (3074 °C, 5565 °F)
Density near r.t.	7.01 g/cm3
when liquid, at m.p.	6.89 g/cm3
Heat of fusion	7.14 kJ/mol
Heat of vaporization	289 kJ/mol
Molar heat capacity	27.45 J/(mol·K)
اټومي خواص
Oxidation states	+4, +3, +2 (a mildly basic oxide)
Electronegativity	Pauling scale: 1.14
Ionization energies	1st: 533.1 kJ/mol ; 2nd: 1040 kJ/mol ; 3rd: 2130 kJ/mol ; ;
Atomic radius	empirical: 181 pm
Covalent radius	201±6 pm
Miscellanea
Crystal structure	double hexagonal close-packed (dhcp) Double hexagonal close packed crystal structure for neodymium
Speed of sound thin rod	2330 m/s (at 20 °C)
Thermal expansion	α, poly: 9.6 µm/(m·K) (at r.t.)
د تودوخې تېرېدنه	16.5 W/(m·K)
Electrical resistivity	α, poly: 643 nΩ·m
Magnetic ordering	paramagnetic, antiferromagnetic below 20 K
Magnetic susceptibility (χmol)	+5628.0·10−6 cm3/mol (287.7 K)
Young's modulus	α form: 41.4 GPa
Shear modulus	α form: 16.3 GPa
Bulk modulus	α form: 31.8 GPa
Poisson ratio	α form: 0.281
Vickers hardness	345–745 MPa
Brinell hardness	265–700 MPa
CAS Number	7440-00-8
History
Discovery	Carl Auer von Welsbach (1885)
Main isotopes of neodymium
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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.

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د استعمال ځایونه

سرچينې

↑ 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. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)
↑ 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.

دا ليکنه نابشپړه ده، تاسې ددې ليکنې په بشپړولو کې د ويکيپېډيا سره مرسته کولای شئ.

[CIAAW2016-1] 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. {{cite journal}}: Unknown parameter |displayauthors= ignored (|display-authors= suggested) (help)

[2] Gschneidner, K. A.; Eyring, L. (1978). Handbook on the Physics and Chemistry of Rare Earths. Amsterdam: North Holland. ISBN 0444850228.

[3] 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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