週期 7

87 Fr 鍅 223.02 88 Ra 鐳 226.025 89 Ac 錒 227.028 90 Th 釷 232.038 91 Pa 鏷 231.036 92 U 鈾 238.029 93 Np 錼 237.048 94 Pu 鈽 244.064 95 Am 鋂 243.061 96 Cm 鋦 247.07 97 Bk 鉳 247.07 98 Cf 鉲 251.08 99 Es 鑀 252.083 100 Fm 鐨 257.095 101 Md 鍆 258.098 102 No 鍩 259.101 103 Lr 鐒 266.12 104 Rf 鑪 267.122 105 Db 𨧀 268.126 106 Sg 𨭎 269.128 107 Bh 𨨏 270.133 108 Hs 𨭆 269.134 109 Mt 䥑 277.154 110 Ds 鐽 282.166 111 Rg 錀 282.169 112 Cn 鎶 286.179 113 Nh 鉨 286.182 114 Fl 鈇 290.192 115 Mc 鏌 290.196 116 Lv 鉝 293.205 117 Ts 鿬 294.211 118 Og 鿫 295.216