Cobalt Essay

This essay has a total of 329 words and 2 pages.

Cobalt

Cobalt


My report is about the element Cobalt. Cobalt is the 27th element on the
periodical table and has an atomic number of twenty-seven. It has a symbol of
Co. Cobalt¹s atomic weight is 58.9332. It has a melting point of 1,490s C. and
a boiling point of 2,900s C. Cobalt looks almost exactly like iron and nickel.
Cobalt is between iron and nickel on the periodical table and found in only .
001-.002 percent of the earth¹s crust. Cobalt was first found in the Harz
Mountains. People in the silver mines dug up arsenic cobalt ores. Then,
because they thought the ores contained copper, heated the ores releasing
arsenic trioxides. Cobalt was named after the German kobold. A kobold was said
to be an underground goblin or demon. In 1735 cobalt was identified. Cobalt is
a white metal with a bluish cast. It is magnetic and very hard and does not
tarnish.
Cobalt has many uses and I will talk about some of them. It is a very
expensive metal that is used in the manufacture of very many expensive alloys.
Cobalt-iron alloys have very unique and special magnetic properties. For
example, Hyperco is used as the nucleus in strong electromagnets. Alloys
containing titanium, aluminum, cobalt and nickel can be made to become
permanently magnetic. One alloy, called Stellite, is an alloy of cobalt,
Continues for 1 more page >>




  • Magnetism
    Magnetism Magnetism has long been one of the great mysteries of the world. It has gone for so long unexplained and although there has been a lot of progress in figuring out how magnetism works and what its caused by, it still isnt completely understood. There are many theories about magnetism, but there is still much more yet to be discovered about magnetism. In the future it will probably be easily understood, but none the less intriguing. Magnets have intrigued people for a long time; they
  • Magnetism
    Magnetism Magnetism has long been one of the great mysteries of the world. It has gone for so long unexplained and although there has been a lot of progress in figuring out how magnetism works and what its caused by, it still isnt completely understood. There are many theories about magnetism, but there is still much more yet to be discovered about magnetism. In the future it will probably be easily understood, but none the less intriguing. Magnets have intrigued people for a long time; they
  • How does a permanent magnet work?
    How does a permanent magnet work? Some materials have a feature known as ferromagnetism. The prefix ferro refers to Iron, which is one such material. Ferromagnetic materials have the ability to remember the magnetic fields they have been subjected to. An atom consists of a number of negatively charged electrons, orbiting around a positively charged nucleus. These electrons also possess a quantity known as spin, which is roughly analogous to a spinning top. The combination of orbital and spin mot
  • The Gem Of Magnetic Fluids
    The Gem Of Magnetic Fluids 1.1 PRELUDE: The phenomenon of ferromagnetism is associated only with the solid state of matter; like iron, nickel, cobalt and some rare earth metals and their alloys. Thus, up to now, there is no intrinsic homogeneous fluid having ferromagnetic properties; although, theories admit the possibility of ferromagnetism in the liquid state, and suggest that there is no inherent reason why they should not exist [1-3,5]. Ferromagnetism occurs when paramagnetic ions in a solid
  • The Gem Of Magnetic Fluids
    The Gem Of Magnetic Fluids 1.1 PRELUDE: The phenomenon of ferromagnetism is associated only with the solid state of matter; like iron, nickel, cobalt and some rare earth metals and their alloys. Thus, up to now, there is no intrinsic homogeneous fluid having ferromagnetic properties; although, theories admit the possibility of ferromagnetism in the liquid state, and suggest that there is no inherent reason why they should not exist [1-3,5]. Ferromagnetism occurs when paramagnetic ions in a solid