Arsenic
Electron Configuration: 2,8,18,5
Enthalpy of Fusion (kJ mol-1): 27.7
Enthalpy of Vaporisation (kJ mol-1): 31.9
Atomic Radii
Atomic Radius 115 pm
Bohr Radius 114 pm
Covalent Radius 119 pm
Van der Waals 185 pm
Oxidation States
Main As+3, As+5
Other As-3
Ionisation Energies (kJ mol-1) show graph
M - M+ 947
M+ - M2+ 1798
M2+ - M3+ 2735
M3+ - M4+ 4837
M4+ - M5+ 6042
M5+ - M6+ 12305
M6+ - M7+ 15400
M7+ - M8+ 18900
M8+ - M9+ 22600
M9+ - M10+ 26400
Covalent Bonds (kJ mol-1)
As-H 245
As-C 200
As-O 477
As-F 464
As-Cl 293
As-As 348