Lanthanum Element Properties

Lanthanum

s56
Ba
Barium
f57
La
Lanthanum
f58
Ce
Cerium
General
Name(Lanthanum)
Symbol(La)
Number(57)
Group Number(3)
Group(Rare Earth, Metal)
Block(f)
Density(6.146 g/cm3)
Atomic Weight(138.9 atomic mass units)
Atomic Volume(22.6 cm3/mole)
Discover(1839)


States
State(Solid)
Melting Point(1193 K)
Boiling Point(3737 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(6.20 kJ/mol)
Heat of Vaporization(402.1.0 kJ/mol )


Energies
First Ionization Energy(538.10 kJ mol-1)
Second Ionization Energy(1067 kJ/mole)
Third Ionization Energy(1850.3 kJ/mole)
Electronegativity(1.10 )
Electron Affinity(Nil)
Specific Heat( 0.195 J/gK)
Heat Atomization(423 kJ/mole)


Oxidation and Electrons
Shells(2, 8, 18, 18, 9, 2)
Electron Configuration([Xe] 5d1 6s2 )
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(hexagonal close-packed)
Characteristics(Radioactive)
Color(silvery-white)
Uses(carbon lighting applications)
Hardness(Nil)
Toxicity(Low to Moderate)


Reactions
Reaction with Air(Burns to form Lanthanum oxide)
Reaction with 6M HCl(Mild,H2, LaCl3)
Reaction with 15M HNO3(Mild,La(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(3 Stable isotopes)
Hydride(None)
Oxide(La2O3)
Chloride(Lacl3)


Radius
Atomic Radius( 195 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)( 117.2 pm)


Conductivity
Thermal Conductivity(300 K)
Electrical Conductivity(Nil)
Polarizability(23 A3)


Abundance
Source(Synthetic)
Relation Abundance Solar System(Nil)
Abundance Earths Crust(Nil)


s56
Ba
Barium
f57
La
Lanthanum
f58
Ce
Cerium

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