Proprietăți

CAS Number7440-73-5
PubChem CIDna
Rază atomică260
Volum molar71,07
Masă atomică[223]
Blocs
Punct de fierbere677
Bulk Modulus
CategorieMetale alcaline
Structură cristalină
CuloareArgint
Rază de covalență348
Densitate1,87
Electrical Resistivity
Configurație electronică[Rn] 7s1
Electroni pe nivelul de energie2, 8, 18, 32, 18, 8, 1
Electronegativitate0,7
Electrons87
Grupă1
Energie de fuziune2
Energie de evaporare65
Potențial de ionizare4,073
Magnetic Ordering
Magnetic Susceptibility
Masa[223]
Mass Number87
Punct de topire23
NumeFranciu
Neutroni136
Număr atomic223
Număr de oxidare1
Perioadă7
FazăSolid
Poisson Ratio
Protoni87
Shear Modulus
Căldură specifică-
SimbolFr
Conductivitate termică0,15
Van der Waals radius
Young's Modulus
Abundență naturală
Abundența în scoarța Pământuluina
Abundența în Universna
Fr Franciu 87 (223) 1 7 s 87 27.0 677.0 [Rn] 7s1 2 8 18 32 18 8 1 N/A Silver Cubic: Body centered 0.7 {"1":"380"} 380 -44 1 2.7 2.1 64.0 15.0 1 21.7 m 31.7m BetaDecay Solid, AlkaliMetal, Metal, Radioactive, Natural FRAN-si-em Highly rare and unstable, radioactive metal. Since its isotopes have such short half-lives there are no commercially significant compounds of francium. Formed by decay of actinium. Chemical properties similar to cesium. Decays to radium or astatine. PyFLvSg6ZDw Francium
French chemist Georges Urbain successfully separated lutetium from ytterbia in 1907 in Paris.

Austrian scientist Carl Auer von Welsbach and American chemist Charles James also succeeded in isolating lutetium independently in the same year.

Pure lutetium metal was first produced in 1953. Lutetia este numele antic pentru Paris 87 1939 Marguerite Perey France Named after "France"

Isotopes of Lutetium

Standard Atomic Weight

[223]

Izotopi stabili

Izotopi instabili

199Fr 200Fr 201Fr 202Fr 203Fr 204Fr 205Fr 206Fr 207Fr 208Fr 209Fr 210Fr 211Fr 212Fr 213Fr 214Fr 215Fr 216Fr 217Fr 218Fr 219Fr 220Fr 221Fr 222Fr 223Fr 224Fr 225Fr 226Fr 227Fr 228Fr 229Fr 230Fr 231Fr 232Fr

Lutetium is considered to be non toxic
Lutetium was the last natural rare earth element to be discovered
Lutetium oxide is used to make catalysts for cracking hydrocarbons in the petrochemical industry.

Lutetium aluminum garnet has been proposed for use as a lens material in high refractive index immersion lithography.

Lutetium is used as a phosphor in LED light bulbs.