Niobium Element Properties

Niobium

d40
Zr
Zirconium
d41
Nb
Niobium
d42
Mo
Molybdenum
General
Name(Niobium)
Symbol(Nb)
Number(41)
Group Number(5)
Group(Transition metals)
Block(d)
Density(8.57 g/cm3)
Atomic Weight(92.9064 g/mol)
Atomic Volume(10.87 cm3/mol)
Discover(1801)


States
State(Solid)
Melting Point(2750 K)
Boiling Point(5017 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(30 kJ/mol)
Heat of Vaporization(689.9 kJ/mol)


Energies
First Ionization Energy(663.8 kJ/mole)
Second Ionization Energy(1381.7 kJ/mole)
Third Ionization Energy(2416 kJ/mole)
Electronegativity(1.6)
Electron Affinity(86.2 kJ/mole)
Specific Heat(0.26 J/gK)
Heat Atomization(726 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,12,1)
Electron Configuration([Kr] 4d4 5s1)
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(soft)
Color(silvery-white)
Uses(stainless steels, magnets)
Hardness(mohs)
Toxicity(None)


Reactions
Reaction with Air(none, w/ht =>Nb2O3)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(None)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(1)
Hydride(NbH NbH2)
Oxide(NbO NbO2 Nb2O5)
Chloride(NbCl3 NbCl4 NbCl5)


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(53.7 J/m-sec-deg)
Electrical Conductivity(80 1/mohm-cm)
Polarizability(15.7 A3)


Abundance
Source(columbite (oxide))
Relation Abundance Solar System(-0.156 log)
Abundance Earths Crust(1.3 log)


d40
Zr
Zirconium
d41
Nb
Niobium
d42
Mo
Molybdenum

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