›› Physical and chemical properties of Cobalt

Atomic Number:27
Element Symbol:Co
Element Name:Cobalt
Atomic Weight:58.933200
Group Number:9
Group Name:none
Period Number:4
Ground State Configuration:[Ar] 3d7 4s2
Ground State Level:4F9/2
Standard State:Solid
Bond Length:250.6
Atomic Radius Empirical:135
Atomic Radius Calculated:152
Covalent Radius Empirical:126
Electron Affinity:63.7
First Ionization Energy:760.4
Pauling Electronegativity:1.88
Sanderson Electronegativity:2.56
Allred Rochow Electronegativity:1.70
Density Of Solid:8900
Molar Volume:6.67
Velocity Of Sound:4720
Youngs Modulus:209
Rigidity Modulus:75
Bulk Modulus:180
Poissons Ratio:0.31
Mineral Hardness:5.0
Brinell Hardness:700
Vickers Hardness:1043
Electrical Resistivity:6
Melting Point:1495
Boiling Point:2927
Thermal Conductivity:100
Coefficient Of Linear Expansion:13.0
Enthalpy Of Fusion:16.2
Enthalpy Of Vaporization:375
Enthalpy Of Atmization:426
Most Common Oxidation Numbers:3,2
Color:Lustrous, metallic, greyish tinge
Discovered By:Georg Brandt
Discovered At:Sweden
Discovered When:1735
Origin Of Name:From the German word kobald meaning goblin or evil spirit

Calculate the molecular weight of Cobalt or molecular weight Co.

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

››Compounds that contain Cobalt

Cobalt Chloride  CoCl2
Cobalt(II) Aluminate  CoAl2O4
Cobalt(II) Bromide  CoBr2
Cobalt(II) Cyanide  Co(CN)2
Cobalt(II) Acetate  Co(C2H3O2)2
Cobalt(II) Oxalate  CoC2O4
Cobalt(II) Naphthenate  Co(C11H10O2)2
Cobalt(III) Acetylacetonate  CoC15H21O6
Cobalt(II) Perchlorate  Co(ClO4)2
Cobalt(II) Chloride Hexahydrate  CoCl2.6H2O
Cobalt(III) Chloride  CoCl3
Cobalt(II) Chromate  CoCrO4
Cobalt(II) Chromite  CoCr2O4
Cobalt(III) Fluoride  CoF3
Cobalt(IV) Fluoride  CoF4
Cobalt(II) Iodide  CoI2
Cobalt(II) Iodate  Co(IO3)2
Cobalt(II) Molybdate  CoMoO4
Cobalt(II) Nitrate  Co(NO3)2
Cobalt(II) Nitrate Hexahydrate  Co(NO3)2.6H2O
Cobalt(III) Nitrate  Co(NO3)3
Cobalt(II) Oxide  CoO
Cobalt(II) Hydroxide  Co(OH)2
Cobalt(III) Hydroxide  Co(OH)3
Cobalt(IV) Sulfide  CoS2
Cobalt(II) Selenide  CoSe
Cobalt(II) Telluride  CoTe
Cobalt(II) Titanate  CoTiO3
Cobalt(II) Tungstate  CoWO4
Cobalt(III) Oxide  Co2O3
Cobalt(III) Oxide Monohydrate  Co2O3.H2O
Cobalt(II) Sulfate  CoSO4
Cobalt(III) Sulfide  Co2S3
Cobalt(II) Orthosilicate  Co2SiO4
Cobalt(II) Stannate  Co2SnO4
Cobalt(III) Titanate  Co2TiO4
Cobalt(II) Ferricyanide  Co3(Fe(CN)6)2
Sodium Cobaltnitrite  Na3Co(NO2)6
Cobalt(II) Carbonate  CoCO3
Cyanocobalamin  C63H88CoN14O14P