Phosphorus vs Hafnium

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PropertyP PhosphorusHf Hafnium
Atomic number1572
SymbolPHf
NamePhosphorusHafnium
Categorynonmetaltransition-metal
Standard Atomic Weight30.973762 u178.49 u
Period36
Group154
Blockps
Phase at STPsolidsolid
Electron configuration[Ne]3s23p3[Xe]6s24f145d2
Oxidation states[-3, -2, -1, 0, 1, 2, 3, 4, 5][-2, 0, 1, 2, 3, 4]
Electronegativity (Pauling)2.191.3
Electron affinity0.7466 eV0.178 eV
Density1820 kg/m³1.330000e+4 kg/m³
Melting point44.15 °C2232.85 °C
Boiling point280.5 °C4602.85 °C
Discovery year16691911