鉍（原子量：20898040 1）的同位素，沒有一個是穩定的，但是有一個天然放射性同位素，其半衰期長達 201 年，基本可當作是穩定同位素。鉍其它最穩定的同位素有 210mBi（半衰期 304 萬年）、208Bi（半衰期 368 萬年）、207Bi（半衰期 3122 年），但它們都是人造同位素。鉍最穩定的天然放射性同位素是 210Bi，半衰期 5012 天。 圖表 184Bi styletextalignright 83 styletextalignright 101 18400112 14 66 15 ms 3 styletextindent1em 184mBi colspan3 styletextindent2em 150 100 keV 13 2 ms 10 rowspan2185Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 102 rowspan218499763 6 rowspan22 ms 184Pb rowspan292 rowspan2 （不常見） 181Tl rowspan2 styletextindent1em 185mBi rowspan2 rowspan2 colspan3 styletextindent2em 70 50 keV rowspan249 7 µs 181Tl rowspan212 rowspan2 184Pb rowspan2186Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 103 rowspan218599660 8 rowspan2148 7 ms 182Tl rowspan23 rowspan2 （不常見） 186Pb rowspan2 styletextindent1em 186mBi rowspan2 rowspan2 colspan3 styletextindent2em 270 140 keV rowspan298 4 ms 182Tl rowspan210 rowspan2 186Pb rowspan2187Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 104 rowspan2186993158 16 rowspan232 3 ms 50 183Tl rowspan292 rowspan2 50 187Pb styletextindent1em 187m1Bi colspan3 styletextindent2em 101 20 keV 320 70 µs 12 styletextindent1em 187m2Bi colspan3 styletextindent2em 252 1 keV 7 5 µs 132 rowspan2188Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 105 rowspan218799227 5 rowspan244 3 ms 184Tl rowspan23 rowspan2 （不常見） 188Pb rowspan2 styletextindent1em 188mBi rowspan2 rowspan2 colspan3 styletextindent2em 210 140 keV rowspan2220 40 ms 184Tl rowspan210 rowspan2 （不常見） 188Pb rowspan2189Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 106 rowspan218898920 6 rowspan2674 11 ms 51 185Tl rowspan292 rowspan2 49 189Pb styletextindent1em 189m1Bi colspan3 styletextindent2em 181 6 keV 50 1 ms 12 styletextindent1em 189m2Bi colspan3 styletextindent2em 357 1 keV 880 50 ns 132 rowspan2190Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 107 rowspan21899883 2 rowspan263 1 s 77 186Tl rowspan23 rowspan2 30 190Pb rowspan2 styletextindent1em 190m1Bi rowspan2 rowspan2 colspan3 styletextindent2em 420 180 keV rowspan262 1 s 70 186Tl rowspan210 rowspan2 23 190Pb styletextindent1em 190m2Bi colspan3 styletextindent2em 690 180 keV 500 100 ns 7 rowspan2191Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 108 rowspan2190985786 8 rowspan2123 3 s 60 187Tl rowspan292 rowspan2 40 191Pb rowspan2 styletextindent1em 191mBi rowspan2 rowspan2 colspan3 styletextindent2em 240 4 keV rowspan2124 5 ms 75 187Tl rowspan212 rowspan2 25 191Pb rowspan2192Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 109 rowspan219198546 4 rowspan2346 9 s 82 192Pb rowspan23 rowspan2 18 188Tl rowspan2 styletextindent1em 192mBi rowspan2 rowspan2 colspan3 styletextindent2em 150 30 keV rowspan2396 4 s 908 192Pb rowspan210 rowspan2 92 188Tl rowspan2193Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 110 rowspan219298296 1 rowspan267 3 s 95 193Pb rowspan292 rowspan2 5 189Tl rowspan2 styletextindent1em 193mBi rowspan2 rowspan2 colspan3 styletextindent2em 308 7 keV rowspan232 6 s 90 189Tl rowspan212 rowspan2 10 193Pb rowspan2194Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 111 rowspan219398283 5 rowspan295 3 s 9954 194Pb rowspan23 rowspan2 46 190Tl rowspan2 styletextindent1em 194m1Bi rowspan2 rowspan2 colspan3 styletextindent2em 110 70 keV rowspan2125 2 s 194Pb rowspan267 rowspan2 （不常見） 190Tl styletextindent1em 194m2Bi colspan3 styletextindent2em 230 90 keV 115 4 s 10 rowspan2195Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 112 rowspan2194980651 6 rowspan2183 4 s 9997 195Pb rowspan292 rowspan2 03 191Tl rowspan2 styletextindent1em 195m1Bi rowspan2 rowspan2 colspan3 styletextindent2em 399 6 keV rowspan287 1 s 67 195Pb rowspan212 rowspan2 33 191Tl styletextindent1em 195m2Bi colspan3 styletextindent2em 23114X keV 750 50 ns 292 rowspan2196Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 113 rowspan2195980667 26 rowspan251 2 min 9999 196Pb rowspan23 rowspan2 00115 192Tl rowspan2 styletextindent1em 196m1Bi rowspan2 rowspan2 colspan3 styletextindent2em 1666 30 keV rowspan206 5 s IT 196Bi rowspan27 rowspan2 196Pb styletextindent1em 196m2Bi colspan3 styletextindent2em 270 3 keV 400 5 min 10 rowspan2197Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 114 rowspan2196978864 9 rowspan2933 50 min 9999 197Pb rowspan292 rowspan2 104 193Tl rowspan3 styletextindent1em 197m1Bi rowspan3 rowspan3 colspan3 styletextindent2em 690 110 keV rowspan3504 16 min 55 193Tl rowspan312 rowspan3 45 197Pb IT 3 197Bi styletextindent1em 197m2Bi colspan3 styletextindent2em 21293 4 keV 204 18 ns 232 styletextindent1em 197m3Bi colspan3 styletextindent2em 23604 5X keV 263 13 ns 292 styletextindent1em 197m4Bi colspan3 styletextindent2em 23831 7X keV 253 39 ns 292 styletextindent1em 197m5Bi colspan3 styletextindent2em 29295 5 keV 209 30 ns 312 198Bi styletextalignright 83 styletextalignright 115 19797921 3 103 3 min 198Pb 23 styletextindent1em 198m1Bi colspan3 styletextindent2em 280 40 keV 116 3 min 198Pb 7 styletextindent1em 198m2Bi colspan3 styletextindent2em 530 40 keV 77 5 s 10 199Bi styletextalignright 83 styletextalignright 116 198977672 13 27 1 min 199Pb 92 rowspan3 styletextindent1em 199m1Bi rowspan3 rowspan3 colspan3 styletextindent2em 667 4 keV rowspan32470 15 min 98 199Pb rowspan312 rowspan3 IT 2 199Bi 01 195Tl styletextindent1em 199m2Bi colspan3 styletextindent2em 1947 25 keV 010 3 µs 252 styletextindent1em 199m3Bi colspan3 styletextindent2em 25470 keV 168 13 ns 292 200Bi styletextalignright 83 styletextalignright 117 199978132 26 364 5 min 200Pb 7 rowspan2 styletextindent1em 200m1Bi rowspan2 rowspan2 colspan3 styletextindent2em 100 70 keV rowspan231 2 min 90 200Pb rowspan22 rowspan2 IT 10 200Bi styletextindent1em 200m2Bi colspan3 styletextindent2em 42820 10 keV 400 50 ms 10 rowspan2201Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 118 rowspan2200977009 16 rowspan2108 3 min 9999 201Pb rowspan292 rowspan2 104 197Tl rowspan3 styletextindent1em 201m1Bi rowspan3 rowspan3 colspan3 styletextindent2em 84634 21 keV rowspan3591 6 min 929 201Pb rowspan312 rowspan3 IT 68 201Bi 3 197Tl styletextindent1em 201m2Bi colspan3 styletextindent2em 19322X keV 118 28 ns 252 styletextindent1em 201m3Bi colspan3 styletextindent2em 19712X keV 105 75 ns 272 styletextindent1em 201m4Bi colspan3 styletextindent2em 273990 20X keV 124 4 ns 292 rowspan2202Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 119 rowspan2201977742 22 rowspan2172 5 h 202Pb rowspan25 rowspan2 105 198Tl styletextindent1em 202m1Bi colspan3 styletextindent2em 615 7 keV 304 6 µs 10 styletextindent1em 202m2Bi colspan3 styletextindent2em 26071 5 keV 310 50 ns 17 rowspan2203Bi rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 120 rowspan2202976876 23 rowspan21176 5 h 203Pb rowspan292 rowspan2 105 199Tl styletextindent1em 203m1Bi colspan3 styletextindent2em 109814 7 keV 303 5 ms IT 203Bi 12 styletextindent1em 203m2Bi colspan3 styletextindent2em 20415 6 keV 194 30 ns 252 204Bi styletextalignright 83 styletextalignright 121 203977813 28 1122 10 h 204Pb 6 styletextindent1em 204m1Bi colspan3 styletextindent2em 8055 3 keV 130 1 ms IT 204Bi 10 styletextindent1em 204m2Bi colspan3 styletextindent2em 28334 11 keV 107 3 ms 17 205Bi styletextalignright 83 styletextalignright 122 204977389 8 1531 4 d 205Pb 92 206Bi styletextalignright 83 styletextalignright 123 205978499 8 6243 3 d 206Pb 6 styletextindent1em 206m1Bi colspan3 styletextindent2em 59897 17 keV 77 2 µs 4 styletextindent1em 206m2Bi colspan3 styletextindent2em 10448 5 keV 890 10 µs 10 207Bi styletextalignright 83 styletextalignright 124 2069784707 26 329 14 y 207Pb 92 styletextindent1em 207mBi colspan3 styletextindent2em 210149 16 keV 182 6 µs 212 208Bi styletextalignright 83 styletextalignright 125 2079797422 25 368 4105 y 208Pb 5 styletextindent1em 208mBi colspan3 styletextindent2em 15711 4 keV 258 4 ms IT 208Bi 10 209Bi 以前被認為是錼衰變鏈的最終衰變產物放射性同位素 styletextalignright 83 styletextalignright 126 2089803987 16 19 21019 y 以前被認為是最重的穩定核素 205Tl 92 10000 rowspan2210Bi rowspan2Radium E rowspan2 styletextalignright 83 rowspan2 styletextalignright 127 rowspan22099841204 16 rowspan25012 5 d 210Po rowspan21 rowspan2 痕量 238U 的衰變產物 132104 206Tl styletextindent1em 210mBi colspan3 styletextindent2em 27131 11 keV 304 6106 y 206Tl 9 rowspan2211Bi rowspan2Actinium C rowspan2 styletextalignright 83 rowspan2 styletextalignright 128 rowspan2210987269 6 rowspan2214 2 min 9972 207Tl rowspan292 rowspan2 痕量 235U 的衰變產物 276 211Po styletextindent1em 211mBi colspan3 styletextindent2em 1257 10 keV 14 3 µs 252 rowspan3212Bi rowspan3Thorium C rowspan3 styletextalignright 83 rowspan3 styletextalignright 129 rowspan32119912857 21 rowspan36055 6 min 6405 212Po rowspan31 rowspan3 痕量 232Th 的衰變產物 3594 208Tl 014 208Pb rowspan3 styletextindent1em 212m1Bi rowspan3 rowspan3 colspan3 styletextindent2em 250 30 keV rowspan3250 2 min 67 208Tl rowspan39 rowspan3 33 212mPo 3 208Pb styletextindent1em 212m2Bi colspan3 styletextindent2em 2200 200 keV 70 3 min 15 rowspan2213Bi 用於核醫學 rowspan2 rowspan2 styletextalignright 83 rowspan2 styletextalignright 130 rowspan2212994385 5 rowspan24559 6 min 9791 213Po rowspan292 rowspan2 209 209Tl rowspan3214Bi rowspan3Radium C rowspan3 styletextalignright 83 rowspan3 styletextalignright 131 rowspan3213998712 12 rowspan3199 4 min 9997 214Po rowspan31 rowspan3 痕量 021 210Tl 003 210Pb 215Bi styletextalignright 83 styletextalignright 132 215001770 16 76 2 min 215Po 92 痕量 styletextindent1em 215mBi colspan3 styletextindent2em 13475 25 keV 364 25 min 252 216Bi styletextalignright 83 styletextalignright 133 216006306 12 217 5 min 216Po 1 217Bi styletextalignright 83 styletextalignright 134 217009372 19 985 8 s β 217Po 92 styletextindent1em 217mBi colspan3 styletextindent2em 1480 40 keV 270 6 μs IT 217Bi 252 218Bi styletextalignright 83 styletextalignright 135 218014188 29 33 1 s β 218Po 6 7 8 219Bi styletextalignright 83 styletextalignright 136 219017480 210 87 29 s β 219Po 92 220Bi styletextalignright 83 styletextalignright 137 220022350 320 95 57 s β 220Po 1 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 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 Bi