Actinium Element Properties

Actinium

s88
Ra
Radium
f89
Ac
Actinium
f90
Th
Thorium
General
Name(Actinium)
Symbol(Ac)
Number(89)
Group Number(3)
Group(Transition metals)
Block(f)
Density(10.07 g/cm3)
Atomic Weight(227 g/mol)
Atomic Volume(22.54 cm3/mol)
Discover(1899)


States
State(Solid)
Melting Point(1323 K)
Boiling Point(3471 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(14 kJ/mol)
Heat of Vaporization(400 kJ/mol)


Energies
First Ionization Energy(499 kJ/mole)
Second Ionization Energy(1170 kJ/mole)
Third Ionization Energy(Nil)
Electronegativity(1.1)
Electron Affinity(Nil)
Specific Heat(Nil)
Heat Atomization(385 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,18,9,2)
Electron Configuration([Rn] 6d1 7s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(3)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(3)


Appearance and Characteristics
Crystal Structure(cubic face centered)
Characteristics(Radioactive)
Color(silvery-white)
Uses(thermoelectric power)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(mild, w/ht, =>Ac2O3)
Reaction with 6M HCl(mild, =>H2, AcCl3)
Reaction with 15M HNO3(mild, =>Ac(NO3)3)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(2)
Hydride(AcH2)
Oxide(Ac2O3)
Chloride(AcCl3)


Radius
Atomic Radius(Nil)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(126 pm)


Conductivity
Thermal Conductivity(Nil)
Electrical Conductivity(Nil)
Polarizability(32.1 A3)


Abundance
Source(Synthetic(U-235 decay))
Relation Abundance Solar System(Nil)
Abundance Earths Crust(-9.3 log)


s88
Ra
Radium
f89
Ac
Actinium
f90
Th
Thorium

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