PERIODIC ELEMENT
Cl (Chlorine)

 



Atomic number : 17
Atomic mass : 35.435 g.mol-1
Electronegativity according to Pauling : 3.0
Density : 3.21.8*10*3g.cm3 at 20 °C
Melting point : -101 °C
Boiling point : -34.6 °C
Vanderwaals radius : 0.127 nm
Ionic radius : 0.184 nm (-2) ; 0.029 (+6)
Isotopes : 4
Electronic shell : [Ne] 3s23p5
Energy of first ionisation : 1255.7 kJ.mol-1
Energy of second ionisation : 2298 kJ.mol-1
Energy of third ionisation : 3822 kJ.mol-1
Standard potential : -1.36 V
Discovered by : Carl Wilhelm Scheele in 1774
 
Atomic Structure Uses (Water purification, bleaches)