Ytterbium

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Ytterbium, 70Yb
Template:Infobox element/symbol-to-top-image/alt
Ytterbium
Pronunciation/ɪˈtɜːrbiəm/ (ih-TUR-bee-əm)
Appearancesillery white
Standard atomic weight Ar, std(Yb)173.045(10)[1]
Ytterbium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
-

Yb

No
thuliumytterbiumlutetium
Atomic nummer (Z)70
Groupgroup n/a
Periodperiod 6
Blockf-block
Element category  Lanthanide
Electron confeeguration[Xe] 4f14 6s2
Electrons per shell2, 8, 18, 32, 8, 2
Pheesical properties
Phase at STPsolit
Meltin pynt1097 K ​(824 °C, ​1515 °F)
Bylin pynt1469 K ​(1196 °C, ​2185 °F)
Density (near r.t.)6.90 g/cm3
when liquid (at m.p.)6.21 g/cm3
Heat o fusion7.66 kJ/mol
Heat o vapourisation159 kJ/mol
Molar heat capacity26.74 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 736 813 910 1047 (1266) (1465)
Atomic properties
Oxidation states+1, +2, +3 (a basic oxide)
ElectronegativityPauling scale: ? 1.1
Atomic radiusempirical: 176 pm
Covalent radius187±8 pm
Colour lines in a spectral range
Spectral lines o ytterbium
Ither properties
Naitural occurrenceprimordial
Creestal structurface-centred cubic (fcc)
Face-centered cubic creestal structur for ytterbium
Speed o soond thin rod1590 m/s (at 20 °C)
Thermal expansion(r.t.) (β, poly) 26.3 µm/(m·K)
Thermal conductivity38.5 W/(m·K)
Electrical resistivity(r.t.) (β, poly) 0.250 µ Ω·m
Magnetic orderinparamagnetic
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 haurdness206 MPa
Brinell haurdness343 MPa
CAS Nummer7440-64-4
History
DiskiveryJean Charles Galissard de Marignac (1878)
First isolationGeorges Urbain (1907)
Main isotopes o ytterbium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
166Yb syn 56.7 h ε 166Tm
168Yb 0.13% >1.3×1014 y (α) 164Er
(β+β+) 168Er
169Yb syn 32.026 d ε 169Tm
170Yb 3.04% - (α) 166Er
171Yb 14.28% - (α) 167Er
172Yb 21.83% - (α) 168Er
173Yb 16.13% - (α) 169Er
174Yb 31.83% - (α) 170Er
175Yb syn 4.185 d β 175Lu
176Yb 12.76% >1.6×1017 y (α) 172Er
(ββ) 176Hf
177Yb syn 1.911 o β 177Lu
Decay modes in parentheses are predictit, but hae nae yet been observed
| references

Ytterbium is a chemical element wi seembol Yb an atomic nummer 70. It is the fowerteent an penultimate element in the lanthanide series, or last element in the f-block, which is the basis o the relative stability o the +2 oxidation state. Houiver, lik the ither lanthanides, the maist common oxidation state is +3, seen in its oxide, halides an ither compounds. In aqueous solution, lik compoonds o ither late lanthanides, soluble ytterbium compoonds furm complexes wi nine watter molecules. Acause o its closed-shell electron configuration, its density an meltin an boilin pynts differ frae those o the ither lanthanides.

References[eedit | eedit soorce]

  1. Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.