Francium
 
  
    Atomic number:
     87
    
    Atomic weight:
     (223.0197)
    
   
  
    Shells:
     2,8,18,32,18,8,1
    
    Orbitals:
     [Rn] 7s1
    
   
  
    Melting point:
     27°C
    
    Boiling point:
     677°C
    
   
  
    Covalent radius:
     --
    Å
    Atomic volume:
     --
    cm³/mol
   
  
    Atomic radius:
     --
    Å
    Ionic radius:
     --
    Å
   
  
    Electronegativity:
     0.7
    
    Oxidation states:
     
    
   
  
    1st ionization pot.:
     --
    V
    2nd ionization pot.:
     --
    V
   
  
    3rd ionization pot.:
     --
    V
    Specific heat:
     --
    J/gK
   
  
    Heat of fusion:
     --
    kJ/mol
    Heat of vapor.:
     --
    kJ/mol
   
  
    Thermal conduct.:
     0.15
    W/cmK
    Electrical conduct.:
     0.03
    10^6/cm ohm
   
  
    Density:
     --
    g/cm³
    Valence:
     1