Iron - Fe
Atomic Number 26 Atomic Mass 55.845 Density 7.86 g/mL
State solid Color grey Electronegativity 1.83
Melting Point 1535°C Boiling Point 2750°C
Natural Isotopes Fe-54 5.8% Fe-56 91.72% Fe-57 2.2% Fe-58 0.28%
Abbreviated Electron Configuration [Ar] 3d6 4s2
Known since BC