鉛有 178Pb 至 220Pb 共 43 種同位素，其中 4 個（204Pb、206Pb、207Pb、208Pb）是穩定的。在所有的穩定同位素中，質量數最大。是一個雙幻數核，分別為 82 個質子和 126 箇中子。 圖表 178Pb styletextalignright 82 styletextalignright 96 178003830 26 023 15 ms 174Hg 0 179Pb styletextalignright 82 styletextalignright 97 17900215 21 39 11 ms 175Hg 92 180Pb styletextalignright 82 styletextalignright 98 179997918 22 45 11 ms 176Hg 0 rowspan2181Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 99 rowspan218099662 10 rowspan245 20 ms 98 177Hg rowspan252 rowspan2 rowspan2 2 181Tl rowspan2182Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 100 rowspan2181992672 15 rowspan260 40 ms 55 4035 ms 98 178Hg rowspan20 rowspan2 rowspan2 2 182Tl rowspan2183Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 101 rowspan218299187 3 rowspan2535 30 ms 94 179Hg rowspan232 rowspan2 rowspan2 6 183Tl rowspan2 styletextindent1em 183mPb rowspan2 rowspan2 colspan3 styletextindent2em 94 8 keV rowspan2415 20 ms 179Hg rowspan2132 rowspan2 rowspan2 （不常見） 183Tl rowspan2184Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 102 rowspan2183988142 15 rowspan2490 25 ms 180Hg rowspan20 rowspan2 rowspan2 （不常見） 184Tl rowspan2185Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 103 rowspan2184987610 17 rowspan263 4 s 181Hg rowspan232 rowspan2 rowspan2 （不常見） 185Tl rowspan2 styletextindent1em 185mPb rowspan2 rowspan2 colspan3 styletextindent2em 60 40 keV rowspan2407 15 s 181Hg rowspan2132 rowspan2 rowspan2 （不常見） 185Tl rowspan2186Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 104 rowspan2185984239 12 rowspan2482 3 s 56 182Hg rowspan20 rowspan2 rowspan2 44 186Tl rowspan2187Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 105 rowspan2186983918 9 rowspan2152 3 s 187Tl rowspan232 rowspan2 rowspan2 183Hg rowspan2 styletextindent1em 187mPb rowspan2 rowspan2 colspan3 styletextindent2em 11 11 keV rowspan2183 3 s 98 187Tl rowspan2132 rowspan2 rowspan2 2 183Hg rowspan2188Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 106 rowspan2187980874 11 rowspan2255 1 s 915 188Tl rowspan20 rowspan2 rowspan2 85 184Hg styletextindent1em 188m1Pb colspan3 styletextindent2em 25782 7 keV 830 210 ns 8 styletextindent1em 188m2Pb colspan3 styletextindent2em 2800 50 keV 797 21 ns 189Pb styletextalignright 82 styletextalignright 107 18898081 4 51 3 s 189Tl 32 rowspan2 styletextindent1em 189mPb rowspan2 rowspan2 colspan3 styletextindent2em 40 30 keV rowspan21 min 996 189Tl rowspan2132 rowspan2 rowspan2 4 185Hg rowspan2190Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 108 rowspan2189978082 13 rowspan271 1 s 991 190Tl rowspan20 rowspan2 rowspan2 9 186Hg styletextindent1em 190m1Pb colspan3 styletextindent2em 26148 8 keV 150 ns 10 styletextindent1em 190m2Pb colspan3 styletextindent2em 2618 20 keV 25 µs 12 styletextindent1em 190m3Pb colspan3 styletextindent2em 26582 8 keV 72 6 µs 11 rowspan2191Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 109 rowspan219097827 4 rowspan2133 8 min 99987 191Tl rowspan232 rowspan2 rowspan2 013 187Hg rowspan2 styletextindent1em 191mPb rowspan2 rowspan2 colspan3 styletextindent2em 20 50 keV rowspan2218 8 min 9998 191Tl rowspan2132 rowspan2 rowspan2 02 187Hg rowspan2192Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 110 rowspan2191975785 14 rowspan235 1 min 9999 192Tl rowspan20 rowspan2 rowspan2 0061 188Hg styletextindent1em 192m1Pb colspan3 styletextindent2em 25811 1 keV 164 7 ns 10 styletextindent1em 192m2Pb colspan3 styletextindent2em 26251 11 keV 11 5 µs 12 styletextindent1em 192m3Pb colspan3 styletextindent2em 27435 4 keV 756 21 ns 11 193Pb styletextalignright 82 styletextalignright 111 19297617 5 5 min 193Tl 32 styletextindent1em 193m1Pb colspan3 styletextindent2em 130 80 keV 58 2 min 193Tl 132 styletextindent1em 193m2Pb colspan3 styletextindent2em 26125 5X keV 135 2515 ns 332 rowspan2194Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 112 rowspan2193974012 19 rowspan2120 5 min 100 194Tl rowspan20 rowspan2 rowspan2 73106 190Hg 195Pb styletextalignright 82 styletextalignright 113 194974542 25 15 min 195Tl 32 styletextindent1em 195m1Pb colspan3 styletextindent2em 2029 7 keV 150 12 min 195Tl 132 styletextindent1em 195m2Pb colspan3 styletextindent2em 17590 7 keV 100 7 µs 212 rowspan2196Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 114 rowspan2195972774 15 rowspan237 3 min 196Tl rowspan20 rowspan2 rowspan2 3105 192Hg styletextindent1em 196m1Pb colspan3 styletextindent2em 104920 9 keV 100 ns 2 styletextindent1em 196m2Pb colspan3 styletextindent2em 173827 12 keV 1 µs 4 styletextindent1em 196m3Pb colspan3 styletextindent2em 179751 14 keV 140 14 ns 5 styletextindent1em 196m4Pb colspan3 styletextindent2em 26935 5 keV 270 4 ns 12 197Pb styletextalignright 82 styletextalignright 115 196973431 6 81 17 min 197Tl 32 rowspan3 styletextindent1em 197m1Pb rowspan3 rowspan3 colspan3 styletextindent2em 31931 11 keV rowspan3429 9 min 81 197Tl rowspan3132 rowspan3 rowspan3 IT 19 197Pb 3104 193Hg styletextindent1em 197m2Pb colspan3 styletextindent2em 191410 25 keV 115 20 µs 212 198Pb styletextalignright 82 styletextalignright 116 197972034 16 24 1 h 198Tl 0 styletextindent1em 198m1Pb colspan3 styletextindent2em 21414 4 keV 419 10 µs 7 styletextindent1em 198m2Pb colspan3 styletextindent2em 22314 5 keV 137 10 ns 9 styletextindent1em 198m3Pb colspan3 styletextindent2em 28205 7 keV 212 4 ns 12 199Pb styletextalignright 82 styletextalignright 117 198972917 28 90 10 min 199Tl 32 rowspan2 styletextindent1em 199m1Pb rowspan2 rowspan2 colspan3 styletextindent2em 4295 27 keV rowspan2122 3 min IT 93 199Pb rowspan2132 rowspan2 rowspan2 7 199Tl styletextindent1em 199m2Pb colspan3 styletextindent2em 25638 27 keV 101 2 µs 292 200Pb styletextalignright 82 styletextalignright 118 199971827 12 215 4 h 200Tl 0 rowspan2201Pb rowspan2 rowspan2 styletextalignright 82 rowspan2 styletextalignright 119 rowspan2200972885 24 rowspan2933 3 h 99 201Pb rowspan252 rowspan2 rowspan2 1 201Tl styletextindent1em 201m1Pb colspan3 styletextindent2em 62914 17 keV 61 2 s 132 styletextindent1em 201m2Pb colspan3 styletextindent2em 27185X keV 508 5 ns 292 202Pb styletextalignright 82 styletextalignright 120 201972159 9 525 28103 y 202Tl 0 rowspan2 styletextindent1em 202m1Pb rowspan2 rowspan2 colspan3 styletextindent2em 216983 7 keV rowspan2353 1 h IT 905 202Pb rowspan29 rowspan2 rowspan2 95 202Tl styletextindent1em 202m2Pb colspan3 styletextindent2em 41429 11 keV 110 5 ns 16 styletextindent1em 202m3Pb colspan3 styletextindent2em 53459 13 keV 107 5 ns 19 203Pb styletextalignright 82 styletextalignright 121 202973391 7 51873 9 h 203Tl 52 styletextindent1em 203m1Pb colspan3 styletextindent2em 82520 9 keV 621 8 s IT 203Pb 132 styletextindent1em 203m2Pb colspan3 styletextindent2em 294947 22 keV 480 7 ms 292 styletextindent1em 203m3Pb colspan3 styletextindent2em 29234X keV 122 4 ns 252 204Pb 用於 styletextalignright 82 styletextalignright 122 2039730436 13 colspan3 styletextaligncenter 觀測上穩定被認為會 α 衰變成 200Hg，半衰期超過 1401015 年 0 0014 1 0010400165 styletextindent1em 204m1Pb colspan3 styletextindent2em 127400 4 keV 265 10 ns 4 styletextindent1em 204m2Pb colspan3 styletextindent2em 218579 5 keV 672 3 min 9 styletextindent1em 204m3Pb colspan3 styletextindent2em 226433 4 keV 045 103 µs 7 205Pb styletextalignright 82 styletextalignright 123 2049744818 13 153 7106 y 205Tl 52 styletextindent1em 205m1Pb colspan3 styletextindent2em 2329 7 keV 242 4 µs 12 styletextindent1em 205m2Pb colspan3 styletextindent2em 1013839 13 keV 555 2 ms 132 styletextindent1em 205m3Pb colspan3 styletextindent2em 31957 5 keV 217 5 ns 252 206Pb 鈾衰變鏈的最終衰變產物 Radium G styletextalignright 82 styletextalignright 124 2059744653 13 colspan3 styletextaligncenter 觀測上穩定被認為會 α 衰變成 202Hg 0 0241 1 0208402748 styletextindent1em 206m1Pb colspan3 styletextindent2em 220014 4 keV 125 2 µs 7 styletextindent1em 206m2Pb colspan3 styletextindent2em 40273 7 keV 202 3 ns 12 207Pb 錒衰變鏈的最終衰變產物 Actinium D styletextalignright 82 styletextalignright 125 2069758969 13 colspan3 styletextaligncenter 觀測上穩定被認為會 α 衰變成 203Hg 12 0221 1 0176202365 styletextindent1em 207mPb colspan3 styletextindent2em 1633368 5 keV 806 6 ms IT 207Pb 132 208Pb 釷衰變鏈的最終衰變產物 Thorium D styletextalignright 82 styletextalignright 126 2079766521 13 colspan3 styletextaligncenter 觀測上穩定最重的觀測上穩定核素，被認為會 α 衰變成 204Hg，半衰期超過 21019 年 0 0524 1 0512805621 styletextindent1em 208mPb colspan3 styletextindent2em 4895 2 keV 500 10 ns 10 209Pb styletextalignright 82 styletextalignright 127 2089810901 19 3253 14 h 209Bi 92 痕量 235U 的衰變產物 223Ra 的簇衰變產物 rowspan2210Pb rowspan2Radium DRadioleadRadiolead rowspan2 styletextalignright 82 rowspan2 styletextalignright 128 rowspan22099841885 16 rowspan22220 22 y 100 210Bi rowspan20 rowspan2 痕量 238U 的衰變產物 rowspan2 19106 206Hg styletextindent1em 210mPb colspan3 styletextindent2em 1278 5 keV 201 17 ns 8 211Pb Actinium B styletextalignright 82 styletextalignright 129 2109887370 29 361 2 min 211Bi 92 痕量 235U 的衰變產物 212Pb Thorium B styletextalignright 82 styletextalignright 130 2119918975 24 1064 1 h 212Bi 0 痕量 232Th 的衰變產物 styletextindent1em 212mPb colspan3 styletextindent2em 1335 10 keV 5 1 µs 8 213Pb styletextalignright 82 styletextalignright 131 212996581 8 102 3 min 213Bi 92 214Pb Radium B styletextalignright 82 styletextalignright 132 2139998054 26 268 9 min 214Bi 0 痕量 styletextindent1em 214mPb colspan3 styletextindent2em 1420 20 keV 62 03 μs IT 212Pb 8 215Pb styletextalignright 82 styletextalignright 133 215004660 60 234 019 min β 215Bi 92 216Pb styletextalignright 82 styletextalignright 134 216008030 210 165 02 min β 216Bi 0 styletextindent1em 216mPb colspan3 styletextindent2em 1514 20 keV 400 40 ns IT 216Pb 8 217Pb styletextalignright 82 styletextalignright 135 217013140 320 20 5 s β 217Bi 92 218Pb styletextalignright 82 styletextalignright 136 218016590 320 15 7 s β 218Bi 0 219Pb styletextalignright 82 styletextalignright 137 21902214 43 3 s 300 ns 112 220Pb styletextalignright 82 styletextalignright 138 22002591 43 1 s 300 ns 0 鉛 212 212Pb 可用於。 參考文獻 Isotope masses from Ame2003 Atomic Mass Evaluation by G Audi AH Wapstra C Thibault J Blachot and O Bersillon in Nuclear Physics A729 2003 Isotopic compositions and standard atomic masses from Atomic weights of the elements Review 2000 IUPAC Technical Report Pure Appl Chem Vol 75 No 6 pp 683800 2003 and Atomic Weights Revised 2005 Halflife spin and isomer data selected from these sources Editing notes on this articles talk page Audi Bersillon Blachot Wapstra The Nubase2003 evaluation of nuclear and decay properties Nuc Phys A 729 pp 3128 2003 National Nuclear Data Center Brookhaven National Laboratory Information extracted from the NuDat 21 database retrieved Sept 2005 David R Lide ed Norman E Holden in CRC Handbook of Chemistry and Physics 85th Edition online version CRC Press Boca Raton Florida 2005 Section 11 Table of the Isotopes Pb