Assertion: cobalt | /r/HasProperty | atomic
Facets:
Source sentences:
text: cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin.
text: Cobalt is a chemical element with the symbol Co and atomic number 27.
text: cobalt 60 a radioisotope of cobalt, atomic mass 60, having a half-life of 5.27 years and a principal gamma ray energy of 1.33 MeV; used as a radiation therapy source.
text: cobalt 57 a radioisotope of cobalt, atomic mass 57, having a half-life of 270 days; used as a label for cyanocobalamin.
text: cobalt 60 a radioisotope of cobalt, atomic mass 60, having a half-life of 5.27 years and a principal gamma ray energy of 1.33 MeV; used as a radiation therapy source.
text: Cobalt (symbol: Co; atomic number: 27) is a naturally-occurring free element that, once subjected to reductive smelting, becomes a hard and lustrous metal with a silver-gray appearance.