Oxygen vs Arsenic

PropertyO OxygenAs Arsenic
Atomic number833
SymbolOAs
NameOxygenArsenic
Categorynonmetalmetalloid
Standard Atomic Weight15.9994 u74.921595 u
Period24
Group1615
Blockpp
Phase at STPgassolid
Electron configuration[He]2s22p4[Ar]4s23d104p3
Oxidation states[-2, -1, 0, 1, 2][-3, -2, -1, 0, 1, 2, 3, 4, 5]
Electronegativity (Pauling)3.442.18
Electron affinity1.4611 eV0.81 eV
Density1.429 kg/m³5776 kg/m³
Melting point-218.79 °C816.85 °C
Boiling point-182.95 °C613.85 °C
Discovery year17711250