Such information could, in fact, be easily found on the web:
The physical propoerties of caesium are:
- density: 1930 kg/m^3
- melting point: 28.4'C
- boiling point: 641'C
- electrical resistivity: 205 ohm-metre (at 20'C)
- thermal conductivity: 35.9 w/m.K (at 300 K)
- thermal expansion: 97 x 10^-6 m/m.K (at 25'C)
- Young's modulus: 1.7 GPa
- bulk modulud: 1.6 GPa
- latent heat of fusion: 2.09 kJ/mol
- latent heat of vapourization: 63.9 kJ/mol
- specific heat capacity: 32.2 J/mpl.K (at 25'C)
The stable element of caesium is Cs-133. It has 3 radioactive isotopes: Cs-134, Cs-135 and Cs-137
You could find more information on caesium from the following web-page:
http://en.wikipedia.org/wiki/Caesium