'''Cyanide''' is an important [[polyatomic ion]] with [[chemical formula]] is CN<sup>-</sup>. It is highly [[toxic]], and has been used as a weapon in various murders and suicides. | '''Cyanide''' is an important [[polyatomic ion]] with [[chemical formula]] is CN<sup>-</sup>. It is highly [[toxic]], and has been used as a weapon in various murders and suicides. |