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https://en.wikipedia.org/wiki/Cobalt
All the other radioactive isotopes of cobalt have half-lives shorter than 18 hours, and in most cases shorter than 1 second. This element also has 4 meta states, all …
https://pubchem.ncbi.nlm.nih.gov/element/Cobalt
Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. Brandt was attempting to prove that the ability of certain minerals to color glass blue was due to an element and not to bismuth, as was commonly believed at the time. Cobalt's primary ores are cobaltite (CoAsS) and …
https://www.rsc.org/periodic-table/element/27/cobalt
Cobalt is an essential trace element, and forms part of the active site of vitamin B12. The amount we need is very small, and the body contains only about 1 milligram. Cobalt salts can be given to certain animals in small doses to correct mineral deficiencies.
https://onlinelibrary.wiley.com/doi/pdf/10.1002/3527600418.mb744048e0023
Elemental cobalt is absorbed into the lung tissue of exposed humans and results in increased concentrations of soluble cobalt in blood and urine (Angerer et al. 1989). In a study with rats, ultrafine cobalt particles (20 nm) attain solubility in the lungs within hours, larger particles (11 µm) have pulmonary half-lives of 3–4 days (Edel et al. 1994). 2.2.2 Oxidic cobalt compounds
https://education.jlab.org/itselemental/ele027.html
Cobalt was discovered by Georg Brandt, a Swedish chemist, in 1739. 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 (Co 3 (AsO 4) 2).Cobalt is usually recovered as a byproduct of mining and refining nickel ...
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