ډيسپروسيوم

Dysprosium, ₆₆Dy
عمومي خواص
Pronunciation	/dɪsˈproʊziəm/ ; dis-PROH-zee-əm
Appearance	silvery white
Dysprosium په دوراني جدول کې
terbium ← dysprosium → holmium	‍
اټومي شمیره (Z)	66
گروپ, پیریود	group n/a, period 6
بلاک	f-block
Element category	lanthanide
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Xe] 4f10 6s2
Electrons per shell	2, 8, 18, 28, 8, 2
فزیکي خواص
حالت (at STP)	جامد
دويلې کيدو ټکى	1680 K (1407 °C, 2565 °F)
يشنا ټکی	2840 K (2562 °C, 4653 °F)
Density near r.t.	8.540 g/cm3
when liquid, at m.p.	8.37 g/cm3
Heat of fusion	11.06 kJ/mol
Heat of vaporization	280 kJ/mol
Molar heat capacity	27.7 J/(mol·K)
اټومي خواص
Oxidation states	4, 3, 2, 1 (a weakly basic oxide)
Electronegativity	Pauling scale: 1.22
Ionization energies	1st: 573.0 kJ/mol ; 2nd: 1130 kJ/mol ; 3rd: 2200 kJ/mol ; ;
Atomic radius	empirical: 178 pm
Covalent radius	192±7 pm
Miscellanea
Crystal structure	hexagonal close-packed (hcp) Hexagonal close packed crystal structure for dysprosium
Speed of sound thin rod	2710 m/s (at 20 °C)
Thermal expansion	α, poly: 9.9 µm/(m·K) (r.t.)
د تودوخې تېرېدنه	10.7 W/(m·K)
Electrical resistivity	α, poly: 926 nΩ·m (r.t.)
Magnetic ordering	paramagnetic at 300 K
Magnetic susceptibility (χmol)	+103,500·10−6 cm3/mol (293.2 K)
Young's modulus	α form: 61.4 GPa
Shear modulus	α form: 24.7 GPa
Bulk modulus	α form: 40.5 GPa
Poisson ratio	α form: 0.247
Vickers hardness	410–550 MPa
Brinell hardness	500–1050 MPa
CAS Number	7429-91-6
History
Discovery	Lecoq de Boisbaudran (1886)
Main isotopes of dysprosium
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ډيسپروسيوم (په انگرېزي: Dysprosium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Dy سمبول او ۶۶ اتمي شمېرې په وسیله ښودل شوی دی.

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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)
↑ 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] 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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