Lambar atomic 112 tana nufin adadin protons da aka samo a cikin tsakiya na atom na element na copernicium (Cn). Abu ne na roba kuma lambar atomic ta nuna matsayinsa a cikin tebur na lokaci-lokaci. An fara haɗa Copernicium a cikin 1996 ta ƙungiyar masana kimiyyar lissafi ta Jamus a Cibiyar Bincike ta Heavy Ion (GSI) a Darmstadt, Jamus. Sinadarin ba shi da ƙarfi sosai kuma mafi kwanciyar hankali isotope, copernicium-285, yana da rabin rayuwar 'yan daƙiƙa kaɗan kawai.