Phosphorus vs Gallium

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PropertyP PhosphorusGa Gallium
Atomic number1531
SymbolPGa
NamePhosphorusGallium
Categorynonmetalpost-transition-metal
Standard Atomic Weight30.973762 u69.723 u
Period34
Group1513
Blockpp
Phase at STPsolidsolid
Electron configuration[Ne]3s23p3[Ar]4s23d104p1
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-5, -4, -3, -2, -1, 0, 1, 2, 3]
Electronegativity (Pauling)2.191.81
Electron affinity0.7466 eV0.3 eV
Density1820 kg/m³5910 kg/m³
Melting point44.15 °C29.76 °C
Boiling point280.5 °C2203.85 °C
Discovery year16691875