Cobalt element (Co) is in group 9 and period 4 of a periodic table. Cobalt is in the d-block and it is classified as a transition element on the periodic table.
There is a lot more information related to cobalt which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Cobalt element (Information Table)
- Cobalt element in Periodic table
- Facts about Cobalt
- Properties of Cobalt
- Uses of Cobalt
Cobalt Element (Information Table)
The important data related to cobalt element is given in the table below.
|Appearance of cobalt||Bluish shiny gray appearance|
|Atomic number of cobalt||27|
|Symbol of cobalt||Co|
|Atomic mass of cobalt||58.933 u|
|Protons, Neutrons & Electrons in cobalt||Protons: 27, Neutrons: 32, Electrons: 27|
|State of cobalt (at STP)||Solid|
|Group number of cobalt in periodic table||9|
|Period number of cobalt in periodic table||4|
|Block of cobalt in periodic table||d-block|
|Category of cobalt||Transition metals|
|Bohr model or Electrons per shell or Electrons arrangement in cobalt||2, 8, 15, 2|
|Electron configuration of cobalt||[Ar] 3d7 4s2|
|Orbital diagram of cobalt|
|Electronegativity of cobalt (on pauling scale)||1.88|
|Atomic radius of cobalt (van der Waals radius)||192 picometers|
|Density of cobalt||8.9 g/cm3|
|1st ionization energy of cobalt||7.881 eV|
|Main isotope of cobalt||59Co|
|Melting point of cobalt||1768 K or 1495 °C or 2723 °F|
|Boiling point of cobalt||3200 K or 2927 °C or 5301 °F|
|Crystal structure of cobalt||Hexagonal Close Packing (HCP)|
|Discovery of cobalt||By Georg Brandt in 1735|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Cobalt element in Periodic table
The Cobalt element (Co) has the atomic number 27 and is located in group 9 and period 4. Cobalt is a metal and it is classified as a transition element.
Facts about cobalt
Here are a few interesting facts about cobalt element.
- The name “Cobalt” came from the German word “kobald” (which means “goblin”).
- The concentration of cobalt in the earth’s crust is around 25 ppm by weight.
- Cobalt is also present in the human body.
- 30% of cobalt is used in paints industries as well as ceramics industries.
- Cobalt is naturally magnetic like iron. Also the cobalt can maintain its magnetism at higher temperatures.
- Cobalt is obtained as a byproduct while mining copper and nickel.
- Cobalt is largely produced in Africa.
Properties of cobalt
Here is a list of some physical properties and chemical properties of cobalt.
Physical properties of cobalt
- Cobalt has a bluish-gray shiny metallic appearance.
- Cobalt has many isotopes, but the most abundant naturally occurring isotope of cobalt is 59Co.
- The density of cobalt is 8.9 g/cm3 and its atomic mass is 58.933 u.
- The melting point and boiling point of cobalt metal is 1768 K and 3200 K respectively.
Chemical properties of cobalt
- If cobalt is kept open in the air, it reacts with the atmospheric oxygen and forms cobalt oxide.
- Cobalt is a fairly reactive transition metal. It is not found in a free state in nature but it is always found as a compound with other elements in the earth’s crust.
- The electron configuration of cobalt is [Ar] 3d7 4s2, which shows that it has incompletely filled d-orbitals.
Uses of cobalt
Here are some uses of the cobalt element.
- Cobalt is used in manufacturing superalloys that have anticorrosive properties as well as they are stable to higher temperatures.
- Cobalt is used to make magnets for generators, drives, etc which operates at high temperatures. Because cobalt can retain its magnetism even at higher temperatures.
- Cobalt can give different colors when combined with other elements.
- Cobalt is used in manufacturing of inks, paints, and glass which requires blue coloring agent.
- Cobalt is used with other metals in making some engine parts of aircraft as cobalt can resist high temperatures.
- Cobalt is used in making rechargeable batteries.
- The radioactive isotope of cobalt (i.e 60Co) has medical applications to treat cancer tumors.