By. Angela Figueroa Per.8
Discovered in 1739 by Georg Brandt. The origin of the name is derived from the German word 'Kobald', meaning goblin.
How element is used
Colbat is used to make powerful permanent magnets. Stellite alloys, which contail colbalt,chromium and tungsten, are used to make high-speed and high temperature cutting tools and dyes.
Cobalt is brittle, hard, silver-grey transition metal with magnetic properties similar to those of iron. It has a high mealting pint and is hard-wearing even at high tempratures. Its alloys also possesses useful properties and so it finds use in high speed and cutting steel tools for instance.
Cobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. It is a member of group VIII of the periodic table. Like iron, it can be magnetized. It is similar to iron and nickel in its physical properties. The element is active chemically, forming many compounds. Cobalt is stable in air and unaffected by water, but is slowly attacked by dilute acid
Periodic Table Information
- Name: cobal,Symbol: Co, Atomic number: 27,Realtive atomic mass (Ar): 58.933195 (5),Standard state: solid at 298 K,Colour: lustrous, metallic, greyish tinge,Classification: Metallic,Group in periodic table: 9,Group name: (none),Period in periodic table: 4,Block in periodic table: d-block,Electron shell structure: 220.127.116.11 &CAS Registry ID: 7440-48-4
Where is it found in nature?
Cobalt is found in the minerals cobaltite, skutterudite and erythrite. Important ore deposits are found in DR Congo, Canada, Australia,Zambia and Brazil. Most cobalt is formed as a by-product of nickel refining.