Igolide (Au) — inombolo ye-athomu engu-79. Kuyinto yohlu lwezinto ezingeni lomhlaba wonke, kumaphrojekthi kusukela ekubaleni kwe-quantum kuya ekuhloleni umkhathi. Isimo ezimweni ezivamile: siqinile. Amazinga atholakalayo: i-quantum, i-nano, i-micro, elivamile, elemboni, elomkhathi, elezinkanyezi.