Basic Information

  • Name: Cobalt
  • Symbol: Co
  • Atomic Number: 27
  • Atomic Mass: 58.9332 amu
  • Melting Point: 1495.0 °C (1768.15 K, 2723.0 °F)
  • Boiling Point: 2870.0 °C (3143.15 K, 5198.0 °F)
  • Number of Protons/Electrons: 27
  • Number of Neutrons: 32
  • Classification: Transition Metal
  • Crystal Structure: Hexagonal
  • Density @ 293 K: 8.9 g/cm3
  • Color: silver
  • Element location on periodic table: Group 9, Period 4
(Slide show and sources for the information on this page located at the bottom others needed to be located with its information.)

Cobalt Biography, According to

Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. Sadly a picture of Georg Brandt is unavailable. Brandt was attempting to prove that the ability of certain minerals to color glass blue was due to an unknown element and not to
bismuth, as was commonly believed at the time. Cobalt's primary ores are cobaltite (CoAsS) and erythrite (Co3(AsO4)2). Cobalt is usually recovered as a byproduct of mining and refining nickel, silver, lead, copper and iron.

Uses- Although cobalt is used in electroplating to give objects an attractive surface that resists oxidation, it is more widely used to form alloys. Alnico, an alloy consisting of
aluminum, nickel and cobalt is used to make powerful permanent magnets. Stellite alloys, which contain cobalt, chromium and tungsten, are used to make high-speed and high temperature cutting tools and dyes. Cobalt is also used to make alloys for jet engines and gas turbines, magnetic steels and some types of stainless steels.
Cobalt-60, a radioactive
isotope of cobalt, is an important source of gamma rays and is used to treat some forms of cancer and as a medical tracer. Cobalt compounds have been used for centuries to color porcelain, glass, pottery, tile and enamel. Some of these compounds are known as: co balt blue, ceruleum, new blue, smalt, cobalt yellow and cobalt green. In addition to being used as a dye, cobalt is also important to human nutrition as it is an essential part of vitamin B12.
tablems.gif Ions. 2+/3+
Isotope Half Life
Co-56 77.3 days
Co-57 271.8 days
Co-58 70.9 days
Co-58m 9.1 hours
Co-59 Stable
Co-60 5.3 years
Co-60m 10.5 minutes
Co-61 1.7 hours

Some of the most interesting facts about the element Cobalt according, is that it is used to make certian types of glasses, and ceramics. Before now I had never paid much attention to the element. Another interesting fact about this element is that in French it is spelled exactly the same as in English. Although with most other languages Cobalt is spelled Cobalto, Kobolt, or Kobalt. Cobalt's name originated from the German word Kobalt or Kobold which means evil spirit, or the Greek word Cobalos which means mines. Primary mining areas are Zaire, Morocco, Sweden and Canada.
Physical Properties- Cobalt is a hard ferromagnetic, silver-white, hard, lustrous, brittle element. Cobalt is similar to Iron and Nickel in its physical properties.

Frey Scientific

Music for slide show will start automatically, to mute push the speaker button in the top left hand corner next the word Slide. Scroll your mouse over the picture to see the caption. The slide show features pictures of the element and uses of the element. It also features the song Replay by Iyaz. The video description will disappear in a moment. Enjoy. :)