Name: cobalt
Symbol: Co
Atomic number: 27
Atomic weight: 58.933200 (9)
Group in periodic table: 9
Group name:
Period in periodic table: 4
Block in periodic table: d-block
CAS registry ID: 7440-48-4
Marmite is a source of vitamin B12, actually a compound containing cobalt.
Cobalt is a brittle, hard, transition metal with magnetic properties similar to those of iron. Cobalt is present in meteorites. Ore deposits are found in Zaire, Morocco and Canada. Cobalt-60 (60Co) is an artificially produced isotope used as a source of g rays (high energy radiation). Cobalt salts colour glass a beautiful deep blue colour.