Iron element has 26 protons, 30 neutrons and 26 electrons. Iron is a solid metal at room temperature, melting point 1538 ̊C. Iron element is easy to lose 2 or 3 eletrons, and becomes Fe²⁺ or Fe³⁺ ions.

» Common Iron compounds:
• Iron(III) Oxide, Fe2O3
• Iron(II) Oxide, FeO
• Iron(III) Acetate, Fe(C2H3O2)3
• Iron(III) Sulfate, Fe2(SO4)3
• Iron(II) Nitrite, Fe(NO2)2
• Iron(II) Sulfate, FeSO4
• Iron(III) Hydroxide, Fe(OH)3
• Iron(III) Bromide, FeBr3