Samarium

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Samarium, 62Sm
Àdàkọ:Infobox element/symbol-to-top-image/alt
Samarium
Pípè /səˈmɛəriəm/ (sə-MAIR-ee-əm)
Ìhànsójúsilvery white
Ìwúwo átọ̀mù Ar, std(Sm)150.36(2)Àdàkọ:CIAAW2013
Samarium ní orí tábìlì àyè
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 Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver 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 Gold Mercury (element) Thallium Lead 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
-

Sm

Pu
promethiumsamariumeuropium
Nọ́mbà átọ̀mù (Z)62
Ẹgbẹ́group n/a
Àyèàyè 6
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  [[Àdàkọ:Infobox element/symbol-to-category]]
Ìtò ẹ̀lẹ́ktrọ́nùÀdàkọ:Infobox element/symbol-to-electron-configuration
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 24, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́1345 K ​(1072 °C, ​1962 °F)
Ígbà ìhó2067 K ​(1794 °C, ​3261 °F)
Kíki (near r.t.)7.52 g/cm3
when liquid (at m.p.)7.16 g/cm3
Heat of fusion8.62 kJ/mol
Heat of 165 kJ/mol
Molar heat capacity29.54 J/(mol·K)
 pressure
Atomic properties
Oxidation statesÀdàkọ:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.17
Atomic radiusempirical: 180 pm
Covalent radius198±8 pm
Àdàkọ:Infobox element/spectral lines
Other properties
Natural occurrenceÀdàkọ:Infobox element/symbol-to-occurrence
Crystal structureÀdàkọ:Infobox element/crystal structure
Speed of sound thin rod2130 m/s (at 20 °C)
Thermal expansion(r.t.) (α, poly) 12.7 µm/(m·K)
Thermal conductivity13.3 W/(m·K)
Electrical resistivity(r.t.) (α, poly) 0.940 µ Ω·m
Magnetic orderingparamagnetic[1]
Young's modulus(α form) 49.7 GPa
Shear modulus(α form) 19.5 GPa
Bulk modulus(α form) 37.8 GPa
Poisson ratio(α form) 0.274
Vickers hardness412 MPa
Brinell hardness441 MPa
CAS Number7440-19-9
Main isotopes of samarium
[[Isotope|IsoÀdàkọ:Shytope]] [[Natural abundance|AbunÀdàkọ:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProÀdàkọ:Shyduct]]
144Sm 3.07% 144Sm is stable with 82 neutrons
146Sm syn 1.03×108y α 2.529 142Nd
147Sm 14.99% 1.06×1011y α 2.310 143Nd
148Sm 11.24% 7×1015y α 1.986 144Nd
149Sm 13.82% >2×1015 y α 1.870 145Nd
150Sm 7.38% 150Sm is stable with 88 neutrons
152Sm 26.75% 152Sm is stable with 90 neutrons
154Sm 22.75% 154Sm is stable with 92 neutrons
Àdàkọ:Category-inline
| references

Samarium (pípè /səˈmɛəriəm/, sə-MAIR-ee-əm) je apilese kemika to ni ami-idamo Sm ati nomba atomu 62.


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.