Tantalum Element Properties

Tantalum

d72
Hf
Hafnium
d73
Ta
Tantalum
d74
W
Tungsten
General
Name(Tantalum)
Symbol(Ta)
Number(73)
Group Number(5)
Group(Transition metals)
Block(d)
Density(16.6 g/cm3)
Atomic Weight(180.947 g/mol)
Atomic Volume(10.90 cm3/mol)
Discover(1802)


States
State(Solid)
Melting Point(3290 K)
Boiling Point(5731 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(36.57 kJ/mol)
Heat of Vaporization(732.8 kJ/mol)


Energies
First Ionization Energy(761 kJ/mole)
Second Ionization Energy(Nil)
Third Ionization Energy(Nil)
Electronegativity(1.5)
Electron Affinity(31.1 kJ/mole)
Specific Heat(0.14 J/gK)
Heat Atomization(782 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,11,2)
Electron Configuration([Xe] 4f14 5d3 6s2)
Minimum Oxidation Number(-1)
Maximum Oxidation Number(5)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(5)


Appearance and Characteristics
Crystal Structure(cubic body centered)
Characteristics(hard, inert at <100 deg.C)
Color(gray)
Uses(surg. implants,heat exch.)
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(2)
Hydride(TaH)
Oxide(TaO2 Ta2O5)
Chloride(TaCl3 TaCl4 TaCl5)


Radius
Atomic Radius(146 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)(86 pm)


Conductivity
Thermal Conductivity(57.5 J/m-sec-deg)
Electrical Conductivity(80.321 1/mohm-cm)
Polarizability(13.1 A3)


Abundance
Source(Tantalite (oxide))
Relation Abundance Solar System(-1.684 log)
Abundance Earths Crust(0.3 log)


d72
Hf
Hafnium
d73
Ta
Tantalum
d74
W
Tungsten

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