週期 5

37 Rb 銣 85.468 38 Sr 鍶 87.62 39 Y 釔 88.906 40 Zr 鋯 91.22 41 Nb 鈮 92.906 42 Mo 鉬 95.95 43 Tc 鎝 96.906 44 Ru 釕 101.1 45 Rh 銠 102.906 46 Pd 鈀 106.42 47 Ag 銀 107.868 48 Cd 鎘 112.41 49 In 銦 114.818 50 Sn 錫 118.71 51 Sb 銻 121.76 52 Te 碲 127.6 53 I 碘 126.904 54 Xe 氙 131.29