Protactinium Element Properties

Protactinium

f90
Th
Thorium
f91
Pa
Protactinium
f92
U
Uranium
General
Name(Protactinium)
Symbol(Pa)
Number(91)
Group Number(NA)
Group(Rare Earth, Actinides)
Block(f)
Density(15.4 g/cm3)
Atomic Weight(231.0359 g/mol)
Atomic Volume(15.0 cm3/mol)
Discover(1917)


States
State(Solid)
Melting Point(1841 K)
Boiling Point(4300 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(12.34 kJ/mol)
Heat of Vaporization(481 kJ/mol)


Energies
First Ionization Energy(568 kJ/mole)
Second Ionization Energy(Nil)
Third Ionization Energy(Nil)
Electronegativity(1.5)
Electron Affinity(Nil)
Specific Heat(0.12 J/gK)
Heat Atomization(527 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,20,9,2)
Electron Configuration([Rn] 5f2 6d1 7s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(5)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(5)


Appearance and Characteristics
Crystal Structure(orthorhombic)
Characteristics(Radioactive)
Color(silvery)
Uses(Nil)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(None)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(None)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(PaH3)
Oxide(PaO PaO2 Pa2O5)
Chloride(PaCl4 PaCl5)


Radius
Atomic Radius(163 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)(118 pm)


Conductivity
Thermal Conductivity(Nil)
Electrical Conductivity(Nil)
Polarizability(25.4 A3)


Abundance
Source(Synthetic(U-235 decay))
Relation Abundance Solar System(Nil)
Abundance Earths Crust(-5.9 log)


f90
Th
Thorium
f91
Pa
Protactinium
f92
U
Uranium

english Calculators and Converters

Ask a Question


Sitemap