Barium Element Properties

Barium

s55
Cs
Caesium
s56
Ba
Barium
f57
La
Lanthanum
General
Name(Barium)
Symbol(Ba)
Number(56)
Group Number(2)
Group(Alkali earth metals)
Block(s)
Density(3.51 g/cm3)
Atomic Weight(137.33 g/mol)
Atomic Volume(39.24 cm3/mol)
Discover(1808)


States
State(Solid)
Melting Point(1000 K)
Boiling Point(2170 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(7.12 kJ/mol)
Heat of Vaporization(140.3 kJ/mol)


Energies
First Ionization Energy(502.9 kJ/mole)
Second Ionization Energy(965.2 kJ/mole)
Third Ionization Energy(Nil)
Electronegativity(0.89)
Electron Affinity(Nil)
Specific Heat(0.204 J/gK)
Heat Atomization(180 kJ/mole atoms)


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


Appearance and Characteristics
Crystal Structure(cubic body centered)
Characteristics(soft)
Color(silvery-white)
Uses(X-ray imaging agnt(BaSO4))
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous,wt/ht=>BaO,Ba2N3)
Reaction with 6M HCl(vigorous, =>H2, BaCl2)
Reaction with 15M HNO3(mild, =>Ba(NO3)2)
Reaction with 6M NaOH(passivated)


Other Forms
Number of Isotopes(7)
Hydride(BaH2)
Oxide(BaO)
Chloride(BaCl2)


Radius
Atomic Radius(222 pm)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(149 pm)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(18.4 J/m-sec-deg)
Electrical Conductivity(Nil)
Polarizability(39.7 A3)


Abundance
Source(Barite (sulfate))
Relation Abundance Solar System(0.652 log)
Abundance Earths Crust(2.6 log)


s55
Cs
Caesium
s56
Ba
Barium
f57
La
Lanthanum

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