Arsenic
 
  
    Atomic number:
     33
    
    Atomic weight:
     74.92159
    
   
  
    Shells:
     2,8,18,5
    
    Orbitals:
     [Ar] 3d10 4s2 4p3
    
   
  
    Melting point:
     817°C @ 28 atmos.
    
    Boiling point:
     Sublimes at 613°C
    
   
  
    Covalent radius:
     1.20
    Å
    Atomic volume:
     13.1
    cm³/mol
   
  
    Atomic radius:
     1.33
    Å
    Ionic radius:
     .58 (+3)
    Å
   
  
    Electronegativity:
     2.18
    
    Oxidation states:
     (±3),5
    
   
  
    1st ionization pot.:
     9.8152
    V
    2nd ionization pot.:
     18.633
    V
   
  
    3rd ionization pot.:
     28.351
    V
    Specific heat:
     0.33
    J/gK
   
  
    Heat of fusion:
     --
    kJ/mol
    Heat of vapor.:
     34.760
    kJ/mol
   
  
    Thermal conduct.:
     0.500
    W/cmK
    Electrical conduct.:
     0.0345
    10^6/cm ohm
   
  
    Density:
     5.72
    g/cm³
    Valence:
     -3,0,3,5