PERIODIC ELEMENT
Na (Sodium)

 



Atomic number : 11
Atomic mass : 22.98977 g.mol-1
Electronegativity according to Pauling : 0.9
Density : 0.97 g.cm-3 at 20 °C
Melting point : 97.5 °C
Boiling point : 883 °C
Vanderwaals radius : 0.196 nm
Ionic radius : 0.095 (+1) nm
Isotopes : 3
Electronic shell : [Ne] 3s1
Energy of first ionisation : 495.7 kJ.mol-1
Standard potential : -2.71 V
Discovered by : Sir Humphrey Davy in 1807
 
Atomic Structure Uses (medicine, agriculture, Salt)