Franciu (Fr)

Proprietăți

Abundență naturală
CAS Number	7440-73-5
PubChem CID	na
Rază atomică	260
Volum molar	71,07
Masă atomică	[223]
Bloc	s
Punct de fierbere	677
Bulk Modulus
Categorie	Metale alcaline
Structură cristalină
Culoare	Argint
Rază de covalență	348
Densitate	1,87
Electrical Resistivity
Configurație electronică	[Rn] 7s¹
Electroni pe nivelul de energie	2, 8, 18, 32, 18, 8, 1
Electronegativitate	0,7
Electrons	87
Grupă	1
Energie de fuziune	2
Energie de evaporare	65
Potențial de ionizare	4,073
Magnetic Ordering
Magnetic Susceptibility
Masa	[223]
Mass Number	87
Punct de topire	23
Nume	Franciu
Neutroni	136
Număr atomic	223
Număr de oxidare	1
Perioadă	7
Fază	Solid
Poisson Ratio
Protoni	87
Shear Modulus
Căldură specifică	-
Simbol	Fr
Conductivitate termică	0,15
Van der Waals radius
Young's Modulus
Abundența în scoarța Pământului	na
Abundența în Univers	na

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

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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.

Franciu on ChemicalAid