کينډۍ:Infobox ytterbium

Ytterbium,  ₇₀Yb

عمومي خواص
Pronunciation	/ɪˈtɜːrbiəm/ I-TUR-BEE-əm
Appearance	silvery white; with a pale yellow tint
Ytterbium په دوراني جدول کې
– ↑ Yb ↓ No thulium ← ytterbium → lutetium ‍
اټومي شمیره (Z)	70
گروپ, پیریود	group n/a, period 6
بلاک	f-block
Element category	lanthanide
معياري اټومي وزن (Ar)	کينډۍ:Val
Electron configuration	[Xe] 4f14 6s2
Electrons per shell	2, 8, 18, 32, 8, 2
فزیکي خواص
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)
اټومي خواص
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
Miscellanea
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 (χmol)	+249.0·10−6 cm3/mol (2928 K)
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
History
Naming	after Ytterby (Sweden), where it was mined
Discovery	Jean Charles Galissard de Marignac (1878)
First isolation	Carl Auer von Welsbach (1906)
Main isotopes of ytterbium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct 166Yb syn 56.7 h ε 166Tm 168Yb 0.126% stable 169Yb syn 32.026 d ε 169Tm 170Yb 3.023% stable 171Yb 14.216% stable 172Yb 21.754% stable 173Yb 16.098% stable 174Yb 31.896% stable 175Yb syn 4.185 d β− 175Lu 176Yb 12.887% stable 177Yb syn 1.911 h β− 177Lu

Element navigation

PTytterbiumPT

Tm ←

iso 70Yb ibox    wd:Q1855

→ Lu

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د سرچينو همدا لړليک په ليکنه کې نه ښکاري.

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