Ii-elements zaya zibhaqwa ngokubhaqwa ngokukhawuleza. Abantu bawahlula umoya waba ziintlobo-ntlobo baza bazahlula ii-noble gases kuwo. Kananjalo baaphonononga ii-minerals ezikhethekileyo nezibalulekileyo kumgodi wezimbiwa eSweden ukuze bafumane ii-rare earth metals. I-Radioactivity nayo yafumaneka. Kunamhlanje nje osokhemisti basafumene ii-elements ezahlukeneyo ezili-118. Ezinye zazo zixhaphakile, njenge-oxygen. Ezinye zinqabile kwaye ziphakamile ngexabiso, njengeplatinum. Ezinye azinakufumaneka apha emhlabeni, zingasuke zenziwe kwii-labs, njenge-rutherfordium.