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CESIUM (55Cs132.9054)

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Element Description

The alkali metal cesium, is silvery-white, soft and ductile. It has the lowest melting point of any alkali metal. Cesium reacts violently with water and due to its reaction with oxygen, should be stored in the absence of air. Located in the lower left-hand corner of the periodic table, cesium is the most electropositive element and has the lowest ionization potential.

Property Name Property Value Property Name Property Value
Atomic Code (55Cs132.9054) Atomic Volume 70W/D
CAS # 7440-46-2 First Ionization Energy 90K-cal/g-mole
Electronegativity 0.7Pauling's
Melting Point 28.4°C Covalent Radius 2.35Angstroms
Boiling Point 671°C Electrical Resistivity @ 20°C 20.0µΩ-cm
Density @ 18°C 1.873g/cm3 Crystal Structure Cubic, body centered
Specific Heat @ 20°C 0.052cal/g°C Thermal Neutron Cross Section 20.0barns/atom
Heat of Fusion 3.913cal/g Magnetic Susceptibility 0.10x10-6cgs
Heat of Vaporization 146cal/g Ionization Potential 3.893eV


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