Atomic NumberAtomic Number of Cobalt
Atomic Number of Cobalt is 27.
Chemical symbol for Cobalt is Co. Number of protons in Cobalt is 27. Atomic weight of Cobalt is 58.933194 u or g/mol. Melting point of Cobalt is 1495 °C and its the boiling point is 2870 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Cobalt
Cobalt is a light grey and bluish metal, which is similar to iron in its qualities and can be easily magnetized. Its name is believed to take roots from a German word meaning goblin. This metal used to be one of the materials widely used in ancient China to produce porcelain and add a bit of beautiful blue color to it. This element can be found in some minerals, as it was discovered that there are some cobalt deposits at the bottom of the oceans. This element is crucial for all living organisms, but in micro doses. If consumed in larger doses, cobalt is very carcinogenic. With industrial purposes, cobalt is usually used in alloys with iron, nickel, and aluminum, to produce powerful magnets. Due to its high strengths, the alloys of this metal are used in aircraft production, etc.
Uses of Cobalt
Cobalt, a chemical element with the symbol Co, is used in making magnets. It also alloys with aluminum, platinum, iron, and nickel. Cobalt blue has been used as a coloring agent in jewelry and Chinese porcelain. Cobalt compounds are used in the manufacture of porcelain enamels and batteries as well as in paints and inks. Cobalt had been used in imparting a blue color to glazes, glass, and ceramics. Cobalt can be used in the production of catalysts too. It is also used in medicine, in electroplating, and in agriculture.
Cobalt(II) fluoride, a compound with the formula CoF2, is used as a catalyst to alloy metals. It also can be used in dental care.
Compounds with Cobalt
- CoO: Cobalt(II) oxide
- Co3O4: Cobalt(II,III) oxide
- Co2O3: Cobalt(III) oxide
- CoS2: Cobalt(II) sulfides
- Co2S3: Cobalt(III) sulfide
- CoF2: Cobalt(II) fluoride
- CoCl2: Cobalt(II) chloride
- CoBr2: Cobalt(II) bromide
- CoI2: Cobalt(II) iodide
- LiCoO2: Lithium cobalt oxide
Properties of Cobalt Element
| Atomic Number (Z) | 27 |
|---|---|
| Atomic Symbol | Co |
| Group | 9 |
| Period | 4 |
| Atomic Weight | 58.933194 u |
| Density | 8.86 g/cm3 |
| Melting Point (K) | 1768 K |
| Melting Point (℃) | 1495 °C |
| Boiling Point (K) | 3200 K |
| Boiling Point (℃) | 2870 °C |
| Heat Capacity | 0.421 J/g · K |
| Abundance | 25 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Transition metal |
| Electronegativity (Pauling) χ | 1.91 |
| Ionization Energy (eV) | 7.6398 |
| Atomic Radius | 135pm |
| Covalent Radius | 121pm |
| Van der Waals Radius | 163 |
| Valence Electrons | 2 |
| Year of Discovery | 1735 |
| Discoverer | Brandt |