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Element Details

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BARIUM (56Ba137.327)

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Element Description

Pure barium is silvery-white, soft, and metallic. As a member of the alkaline earth group, it resembles calcium chemically. Naturally occuring barium is composed of seven stable isotopes and is not found in its elemental form. The metal oxides very easily and should be stored in an oxygen-free environment. Barium reacts with water and alcohol.

Property Name Property Value Property Name Property Value
Atomic Code (56Ba137.327) Heat of Vaporization 35.7k/cal/g-atom
CAS # 7440-39-3 Atomic Volume 39W/D
First Ionization Energy 120K-cal/g/mole
Melting Point 727°C Electronegativity 0.9Pauling's
Boiling Point 1640°C Covalent Radius 1.98Angstroms
Density 3.62g/cm3 Electrical Resistivity @ 20°C 50µΩ-cm
Specific Heat @ 25°C 0.068cal/g°C Crystal Structure Cubic, body centered
Heat of Fusion 1.83k-cal/g-atom Electron Work Function 2.5eV


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