Historically, great concern has been expressed that 6-MV photons have too large a buildup region and can potentially underdose superficial tissues. Cobalt-60 has a half-life of 5.27 years and decays into nickel-60 through beta decay. The Democratic Republic of the Congo (DRC) … Production of Cobalt-60 Radioactive cobalt-60 was discovered by Glenn T. Seaborg and John Livingood at the University of California - Berkeley in the late 1930's. History and Discovery. The existence of technetium was first proposed long before it was discovered. Its compounds are known as cobalt blue used to color pottery and glass. The solution was at hand and Cobalt found its salvation in the mineral for which the town was named – the mineral which, mixed with the silver ore had been only a nuisance, making the smelting and refining operations much more difficult. Cobalt's primary ores are cobaltite (CoAsS) and erythrite (Co 3 … Cobalt-60 is a radioactive isotope. Georg Brandt, (born July 21, 1694, Riddarhyttan, Sweden—died April 29, 1768, Stockholm), Swedish chemist who, through his discovery and isolation of cobalt, became the first person to discover a metal unknown in ancient times. Relevance. Favorite Answer. In more recent times, sources have diversified further with increasing amounts coming from nickel ores and recycling of scrap and cobalt-containing intermediates. Who discovered nickel? 1 decade ago. Science, the threat of war, and improving technology all had a part in Cobalt’s revival. These are used in guitar pickups and high speed motors. It has been found in Egyptian statuettes and in Persian jewelry of the 3 rd millennium BCE. It is widely used in cancer treatment, as a tracer and for radiotherapy. Cobalt is a chemical element. There were many claims of discovery from 1828 through to 1925 when German chemists … This transition element was discovered by Swedish chemist Axel Fredrik Cronstedt in 1751. Answer Save. Cobalt is a chemical element with the symbol Co and atomic number 27. Cobalt was discovered by Swedish chemist George Brandt in 1735. 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 is found in the minerals cobaltite, skutterudite and erythrite. Cobalt has been used as a coloring agent since Bronze Age. For primary treatment of laryngeal cancer, 60 Co allows adequate dosing of the superficial tissues. The radiation given off by the isotope kills cancer cells. Even if Cronstedt was recognized as the scientist who discovered the … The solution was at hand and Cobalt found its salvation in the mineral for which the town was named – the mineral which, mixed with the silver ore had been only a nuisance, making the smelting and refining operations much more difficult. Cobalt is also used in samarium-cobalt permanent magnets. The early forms of the periodic table created in the 1860′s by Dimitri Mendeleev had a gap between elements 42 and 44 because scientists before this time had already predicted the missing element. Who DISCOVERED cobalt? Cobalt 60 (60 Co) is often the ideal mode of radiation for treating laryngeal cancer. 1 Answer. Cobalt is essential to many living creatures and is a component of vitamin B 12. It is an important source of gamma-rays. In 1735, a Swedish chemist named Georg Brandt became the first person to successfully isolate cobalt. The discovery of the element happened when the chemist isolated copper from niccolite.
Instead of extracting the metal, he isolated another element with silvery white color that Cronstedt named nickel. Two other isotopes of cobalt, cobalt-57 and cobalt-58, are used for the same purpose.