›› Physical and chemical properties of Iron

Atomic Number:26
Element Symbol:Fe
Element Name:Iron
Atomic Weight:55.845
Group Number:8
Group Name:none
Period Number:4
Ground State Configuration:[Ar] 3d6 4s2
Ground State Level:5D4
Standard State:Solid
Bond Length:248.2
Atomic Radius Empirical:140
Atomic Radius Calculated:156
Covalent Radius Empirical:125
Electron Affinity:15.7
First Ionization Energy:762.5
Pauling Electronegativity:1.83
Sanderson Electronegativity:2.20
Allred Rochow Electronegativity:1.64
Density Of Solid:7874
Molar Volume:7.09
Velocity Of Sound:4910
Youngs Modulus:211
Rigidity Modulus:82
Bulk Modulus:170
Poissons Ratio:0.29
Mineral Hardness:4.0
Brinell Hardness:490
Vickers Hardness:608
Electrical Resistivity:9.7
Melting Point:1538
Boiling Point:2861
Thermal Conductivity:80
Coefficient Of Linear Expansion:11.8
Enthalpy Of Fusion:13.8
Enthalpy Of Vaporization:347
Enthalpy Of Atmization:415
Most Common Oxidation Numbers:3,2
Color:Lustrous, metallic, greyish tinge
Discovered By:Known since ancient times
Discovered At:not known
Origin Of Name:From the Anglo-Saxon word iron or iren (the origin of the symbol Fe comes from the Latin word ferrum meaning iron). Possibly the word iron is derived from earlier words meaning holy metal because it was used to make the swords used in the Crusades.

Calculate the molecular weight of Iron or molecular weight Fe.

Also see the full list of chemical elements and atomic weights.

››Compounds that contain Iron

Iron Sulfate  FeSO4
Ferrous Sulfate  FeSO4
Ferrous Oxide  FeO
Ferric Oxide  Fe2O3
Hematite  Fe2O3
Iron Sulfide  FeS2
Ferrocene  Fe(C5H5)2
Cobalt(II) Ferricyanide  Co3(Fe(CN)6)2
Copper(II) Ferrocyanide  Cu2Fe(CN)6
Iron(II) Aluminate  Fe(AlO2)2
Iron(III) Arsenic  FeAs
Iron(II) Bromide  FeBr2
Iron(III) Bromide  FeBr3
Iron(II) Carbonate  FeCO3
Iron(II) Acetate  Fe(C2H3O2)2
Iron(II) Chloride  FeCl2
Iron(II) Chloride Dihydrate  FeCl2.2H2O
Iron(II) Chloride Tetrahydrate  FeCl2.4H2O
Iron(III) Chloride  FeCl3
Iron(III) Chloride Hexahydrate  FeCl3.6H2O
Iron Chromite  FeCr2O4
Iron(II) Fluoride  FeF2
Iron(II) Fluoride Tetrahydrate  FeF2.4H2O
Iron(III) Fluoride  FeF3
Iron(III) Fluoride Trihydrate  FeF3.3H2O
Iron(III) Hypophosphite  Fe(H2PO2)3
Iron(II) Iodide  FeI2
Iron(III) Iodide  FeI3
Iron(II) Molybdate  FeMoO4
Iron(II) Nitrate  Fe(NO3)2
Iron(II) Hydroxide  Fe(OH)2
Iron(III) Hydroxide  Fe(OH)3
Iron(III) Phosphate  FePO4
Iron(II) Sulfide  FeS
Iron(II) Selenide  FeSe
Iron(II) Telluride  FeTe
Iron(II) Titanate  FeTiO3
Iron(III) Metavanadate  Fe(VO3)3
Iron(II) Tungstate  FeWO4
Iron(III) Oxalate  Fe2(C2O4)3
Iron(III) Chromate  Fe2(CrO4)3
Iron(III) Dichromate  Fe2(Cr2O7)3
Iron(III) Sulfate  Fe2(SO4)3
Iron(II) Orthosilicate  Fe2SiO4
Iron(II, III) Oxide  Fe3O4
Iron(II) Phosphate  Fe3(PO4)2
Iron(III) Ferrocyanide  Fe4(Fe(CN)6)3
Iron(III) Pyrophosphate  Fe4(P2O7)3
Potassium Ferrate  K2FeO4
Potassium Ferricyanide  K3(Fe(CN)6)
Sodium Ferrocyanide  Na4Fe(CN)6
Zinc Ferrocyanide  Zn2Fe(CN)6
Iron(III) Oxide  Fe2O3
Iron(II) Oxide  FeO
Iron(III) Nitrate  Fe(NO3)3