Praseodymium Element Properties

Praseodymium

f58
Ce
Cerium
f59
Pr
Praseodymium
f60
Nd
Neodymium
General
Name(Praseodymium)
Symbol(Pr)
Number(59)
Group Number(NA)
Group(Rare Earth, Lanthanides)
Block(f)
Density(6.77 g/cm3)
Atomic Weight(140.9077 g/mol)
Atomic Volume(20.8 cm3/mol)
Discover(1885)


States
State(Solid)
Melting Point(1208 K)
Boiling Point(3793 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(6.89 kJ/mol)
Heat of Vaporization(331 kJ/mol)


Energies
First Ionization Energy(523.2 kJ/mole)
Second Ionization Energy(1018 kJ/mole)
Third Ionization Energy(2086 kJ/mole)
Electronegativity(1.13)
Electron Affinity(50 kJ/mole)
Specific Heat(0.19 J/gK)
Heat Atomization(356 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,21,8,2)
Electron Configuration([Xe] 4f3 6s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(4)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(hexagonal)
Characteristics(soft)
Color(silvery-white)
Uses(alloys, Welder's mask)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>Pr6O11 approx)
Reaction with 6M HCl(mild, =>H2, PrCl3)
Reaction with 15M HNO3(mild, =>Pr(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(PrH2 PrH3)
Oxide(PrO2 Pr6O11)
Chloride(PrCl3)


Radius
Atomic Radius(182 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)(113 pm)


Conductivity
Thermal Conductivity(12.5 J/m-sec-deg)
Electrical Conductivity(14.706 1/mohm-cm)
Polarizability(28.2 A3)


Abundance
Source(Monazite(phosphate), bastnaesite)
Relation Abundance Solar System(-0.778 log)
Abundance Earths Crust(0.9 log)


f58
Ce
Cerium
f59
Pr
Praseodymium
f60
Nd
Neodymium

english Calculators and Converters


Sitemap