Changes

Modern cobalt was officially discovered by a Swedish chemist named Georg Brandt, in 1739.<ref>http://education.jlab.org/itselemental/ele027.html</ref>

Modern cobalt was officially discovered by a Swedish chemist named Georg Brandt, in 1739.<ref>http://education.jlab.org/itselemental/ele027.html</ref>

==Uses==

==Uses==

Cobalt is used in several alloys, including Alnico.  These alloys are used in things like jet turbines and gas turbine generators.  Cobalt salts have been used for centuries to give pottery and other items a blue color.  Radioactive cobalt-60 is also useful to treat cancer and in some countries, to irradiate food for preservation.<ref>http://www.rsc.org/periodic-table/element/27/cobalt</ref>

Cobalt is used in several alloys, including [[Alnico]].  These alloys are used in things like jet turbines and gas turbine generators.  Cobalt salts have been used for centuries to give pottery and other items a blue color.  Radioactive cobalt-60 is also useful to treat cancer and in some countries, to irradiate food for preservation.<ref>http://www.rsc.org/periodic-table/element/27/cobalt</ref>

==References==

==References==