Lambar atomic 46 tana nufin adadin protons da ke cikin tsakiya na atom na sinadarin palladium (Pd). A takaice dai, ita ce mai ganowa ta musamman ga palladium, domin babu wani sinadari da ke da protons 46 a cikin tsakiya. Hakanan lambar atom ɗin tana ƙayyade matsayin element ɗin a cikin tebur na lokaci-lokaci kuma ana amfani da shi don tantance ƙayyadaddun tsarin lantarki da halayen sinadarai na element.