د ويکيپېډيا، وړیا پوهنغونډ له خوا
Ytterbium, 70 Yb Pronunciation / ɪ ˈ t ɜːr b i ə m / I -TUR-BEE -əmAppearance silvery white; with a pale yellow tint[۱] اټومي شمیره (Z ) 70 گروپ , پیریود group n/a , period 6 بلاک f-block Element category lanthanide معياري اټومي وزن (A r ) کينډۍ:Val [۲] [۳] [۴] Electron configuration [Xe ] 4f14 6s2 Electrons per shell
2, 8, 18, 32, 8, 2 حالت (at STP ) جامد دويلې کيدو ټکى 1097 K (824 °C, 1515 °F) يشنا ټکی 1469 K (1196 °C, 2185 °F) Density near r.t. 6.90 g/cm3 when liquid, at m.p. 6.21 g/cm3 Heat of fusion 7.66 kJ/mol Heat of vaporization 129 kJ/mol Molar heat capacity 26.74 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
736
813
910
1047
(1266)
(1465)
Oxidation states 3 , 2, 1 (a basic oxide)Electronegativity Pauling scale: 1.1 (?) Ionization energies 1st: 603.4 kJ/mol 2nd: 1174.8 kJ/mol 3rd: 2417 kJ/mol Atomic radius empirical: 176 pm Covalent radius 187±8 pm Crystal structure face-centered cubic (fcc)Face-centered cubic crystal structure for ytterbium Speed of sound thin rod 1590 m/s (at 20 °C) Thermal expansion β, poly: 26.3 µm/(m·K) (r.t. ) د تودوخې تېرېدنه 38.5 W/(m·K) Electrical resistivity β, poly: 0.250 µΩ·m (at r.t. ) Magnetic ordering paramagnetic Magnetic susceptibility (χ mol ) +249.0·10−6 cm3 /mol (2928 K)[۵] Young's modulus β form: 23.9 GPa Shear modulus β form: 9.9 GPa Bulk modulus β form: 30.5 GPa Poisson ratio β form: 0.207 Vickers hardness 205–250 MPa Brinell hardness 340–440 MPa CAS Number 7440-64-4 Naming after Ytterby (Sweden), where it was mined Discovery Jean Charles Galissard de Marignac (1878) First isolation Carl Auer von Welsbach (1906)
| references | in Wikidata
ايتربيوم (په انگرېزي : Ytterbium ) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Yb سمبول او v۰ اتمي شمېرې په وسیله ښودل شوی دی.
تاریخچه [ سمول ]
د استعمال ځایونه [ سمول ]
↑ کينډۍ:Greenwood&Earnshaw
↑ 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 . https://www.degruyter.com/downloadpdf/j/pac.2016.88.issue-3/pac-2015-0305/pac-2015-0305.xml .
↑ "Standard Atomic Weights 2015" . Commission on Isotopic Abundances and Atomic Weights . 12 October 2015. د لاسرسينېټه ۱۸ فبروري ۲۰۱۷ .
↑ "Standard Atomic Weight of Ytterbium Revised" . Chemistry International . October 2015. د کتاب پاڼې 26. doi :10.1515/ci-2015-0512 . eISSN 0193-6484 . ISSN 0193-6484 .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. د کتاب پاڼي E110. د کتاب نړيواله کره شمېره 0-8493-0464-4 .
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