iron ⟵ {\displaystyle \longleftarrow } 27 ⟶ {\displaystyle \longrightarrow } nickel The Simple English Wikipedia has an article on: Cobalt Pronunciation (UK) IPA (key): /ˈkəʊ.bɒlt/ (US) enPR: kō'bält, IPA (key): /ˈkoʊ.bɑlt/ Audio (US)(file) Noun Singular cobalt Plural none Cobalt is a metal and element with an atomic number of 27 and the symbol Co. Cobalt is used to make magnetic alloys. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads