Tl
Thallium
Z 81 204.38 g/molPost-Transition Metal
| 205Tl | 124 | 204.9744 | -23,820.8 | 70.485% | Stable | 1/2+ | --- | 1931 |
| 203Tl | 122 | 202.9723 | -25,761.3 | 29.515% | Stable | 1/2+ | --- | 1931 |
| 176Tl | 95 | 176.0006 | 580.0 | --- | 6.2 ms | (3-) | p→175Hg(100%) α→172Au β⁺→176Hg | 2004 |
| 177Tl | 96 | 176.9964 | -3,340.0 | --- | 18.0 ms | (1/2+) | α→173Au(73%) p→176Hg | 1999 |
| 177mTl | 96 | 176.9973 | -2,533.0 | --- | 230.0 µs | (11/2-) | p→176Hg(51%) α→173Au(49%) | 1997 |
| 178Tl | 97 | 177.9951 | -4,610.0 | --- | 255.0 ms | (4-) | α→174Au(62%) β⁺→178Hg(37.85%) β⁺SF(0.15%) | 1997 |
| 179Tl | 98 | 178.9911 | -8,270.0 | --- | 437.0 ms | 1/2+ | α→175Au(60%) β⁺→179Hg | 1983 |
| 179mTl | 98 | 178.992 | -7,450.0 | --- | 1.41 ms | (11/2-) | α→175Au(100%) γ→179Tl β⁺→179Hg | 1983 |
| 179nTl | 98 | 178.9921 | -7,370.0 | --- | 119.0 ns | (9/2-) | γ→179Tl(100%) | 2018 |
| 180Tl | 99 | 179.9899 | -9,390.0 | --- | 1.09 s | (4-) | β⁺→180Hg(92.997%) α→176Au(7%) β⁺SF(0.003%) | 1987 |
| 181Tl | 100 | 180.9863 | -12,799.0 | --- | 2.9 s | 1/2+ | α→177Au(8.6%) β⁺→181Hg | 1996 |
| 181mTl | 100 | 180.9872 | -11,963.0 | --- | 1.4 ms | (9/2-) | γ→181Tl(99.6%) α→177Au(0.4%) β⁺→181Hg | 1984 |
| 182Tl | 101 | 181.9857 | -13,327.0 | --- | 1.9 s | (4-) | β⁺→182Hg(~100%) α→178Au(>0.49%) β⁺SF(<3.4e-6%) | 1991 |
| 182mTl | 101 | 181.9857 | -13,280.0 | --- | 3.1 s | (7+) | β⁺→182Hg(100%) α→178Au(2.5%) γ→182Tl | 1991 |
| 183Tl | 102 | 182.9822 | -16,587.0 | --- | 6.9 s | 1/2+ | β⁺→183Hg α→179Au | 1980 |
| 183mTl | 102 | 182.9829 | -15,959.0 | --- | 53.3 ms | (9/2-) | α→179Au(1.5%) γ→183Tl β⁺→183Hg | 1980 |
| 183nTl | 102 | 182.9832 | -15,612.0 | --- | 1.48 µs | (13/2+) | γ→183Tl(100%) | 2001 |
| 184Tl | 103 | 183.9819 | -16,883.0 | --- | 9.5 s | 2- | β⁺→184Hg(98.78%) α→180Au(1.22%) | 1976 |
| 184mTl | 103 | 183.9818 | -16,930.0 | --- | 10.6 s | (7+) | β⁺→184Hg(99.53%) α→180Au(0.47%) γ→184Tl | 2016 |
| 184nTl | 103 | 183.9824 | -16,430.0 | --- | 47.1 ms | (10-) | γ→184Tl(~100%) α→180Au(0.089%) | 1984 |
| 185Tl | 104 | 184.9788 | -19,758.0 | --- | 19.5 s | 1/2+ | β⁺→185Hg(100%) α→181Au | 1976 |
| 185mTl | 104 | 184.9793 | -19,303.0 | --- | 1.93 s | 9/2- | γ→185Tl(100%) α→181Au β⁺→185Hg | 1976 |
| 186Tl | 105 | 185.9787 | -19,883.0 | --- | 3.5 s | (2-) | β⁺→186Hg α→182Au | 1975 |
| 186mTl | 105 | 185.9787 | -19,860.0 | --- | 27.5 s | 7+ | β⁺→186Hg(~100%) α→182Au(0.006%) | 1975 |
| 186nTl | 105 | 185.9791 | -19,490.0 | --- | 3.4 s | 10- | γ→186Tl(<94.1%) β⁺→186Hg(>5.9%) | 1977 |
| 187Tl | 106 | 186.9759 | -22,445.0 | --- | --- | 1/2+ | β⁺→187Hg(100%) α→183Au | 1976 |
| 187mTl | 106 | 186.9763 | -22,111.0 | --- | 15.6 s | 9/2- | α→183Au(0.15%) γ→187Tl β⁺→187Hg | 1976 |
| 187nTl | 106 | 186.9779 | -20,570.0 | --- | 1.11 µs | --- | γ→187Tl(100%) | 2000 |
| 188Tl | 107 | 187.976 | -22,336.0 | --- | 1.18 m | (2-) | β⁺→188Hg(100%) | 1970 |
| 188mTl | 107 | 187.9761 | -22,308.0 | --- | 1.19 m | 7+ | β⁺→188Hg(100%) | 1970 |
| 188nTl | 107 | 187.9763 | -22,040.0 | --- | 41.0 ms | 9- | γ→188Tl(100%) β⁺→188Hg | 1981 |
| 189Tl | 108 | 188.9736 | -24,616.0 | --- | 2.3 m | 1/2+ | β⁺→189Hg(100%) | 1972 |
| 189mTl | 108 | 188.9739 | -24,331.0 | --- | 1.4 m | 9/2- | β⁺→189Hg(100%) γ→189Tl | 1972 |
| 190Tl | 109 | 189.9738 | -24,366.0 | --- | 2.6 m | 2- | β⁺→190Hg(100%) | 1970 |
| 190mTl | 109 | 189.9739 | -24,296.0 | --- | 3.6 m | 7+ | β⁺→190Hg(100%) | 1970 |
| 190nTl | 109 | 190.0 | 0.0 | --- | 750.0 µs | (8-) | γ→190Tl(100%) | 1981 |
| 191Tl | 110 | 190.9718 | -26,283.0 | --- | 20.0 m | 1/2+ | β⁺→191Hg | 1974 |
| 191mTl | 110 | 190.9721 | -25,986.0 | --- | 5.22 m | 9/2- | β⁺→191Hg(100%) | 1970 |
| 192Tl | 111 | 191.9722 | -25,870.0 | --- | 9.6 m | 2- | β⁺→192Hg(100%) | 1961 |
| 192mTl | 111 | 191.9724 | -25,670.0 | --- | 10.8 m | 7+ | β⁺→192Hg(100%) | 1961 |
| 192nTl | 111 | 191.9727 | -25,420.0 | --- | 296.0 ns | (8-) | γ→192Tl(100%) | 1980 |
| 193Tl | 112 | 192.9705 | -27,477.0 | --- | 21.6 m | 1/2+ | β⁺→193Hg(100%) | 1960 |
| 193mTl | 112 | 192.9709 | -27,105.0 | --- | 2.11 m | 9/2- | γ→193Tl(75%) β⁺→193Hg(25%) | 1963 |
| 194Tl | 113 | 193.9711 | -26,937.0 | --- | 33.0 m | 2- | β⁺→194Hg(100%) α→190Au | 1960 |
| 194mTl | 113 | 193.9714 | -26,677.0 | --- | 32.8 m | 7+ | β⁺→194Hg(100%) | 1960 |
| 195Tl | 114 | 194.9698 | -28,155.0 | --- | 1.16 h | 1/2+ | β⁺→195Hg(100%) | 1955 |
| 195mTl | 114 | 194.9703 | -27,672.0 | --- | 3.6 s | 9/2- | γ→195Tl(100%) | 1957 |
| 196Tl | 115 | 195.9705 | -27,497.0 | --- | 1.84 h | 2- | β⁺→196Hg(100%) | 1955 |
| 196mTl | 115 | 195.9709 | -27,103.0 | --- | 1.41 h | 7+ | β⁺→196Hg(96.2%) γ→196Tl(3.8%) | 1960 |
| 197Tl | 116 | 196.9696 | -28,354.0 | --- | 2.84 h | 1/2+ | β⁺→197Hg(100%) | 1955 |
| 197mTl | 116 | 196.9702 | -27,746.0 | --- | 540.0 ms | 9/2- | γ→197Tl(100%) | 1953 |
| 198Tl | 117 | 197.9704 | -27,529.0 | --- | 5.3 h | 2- | β⁺→198Hg(100%) | 1949 |
| 198mTl | 117 | 197.971 | -26,985.0 | --- | 1.87 h | 7+ | β⁺→198Hg(55.9%) γ→198Tl(44.1%) | 1949 |
| 198nTl | 117 | 197.9712 | -26,842.0 | --- | 150.0 ns | (5+) | γ→198Tl(100%) | 1977 |
| 199Tl | 118 | 198.9699 | -28,059.0 | --- | 7.42 h | 1/2+ | β⁺→199Hg(100%) | 1949 |
| 199mTl | 118 | 198.9707 | -27,310.0 | --- | 28.4 ms | 9/2- | γ→199Tl(100%) | 1963 |
| 200Tl | 119 | 199.971 | -27,047.0 | --- | 1.09 d | 2- | β⁺→200Hg(100%) | 1949 |
| 200mTl | 119 | 199.9718 | -26,293.0 | --- | 34.0 ms | 7+ | γ→200Tl(100%) | 1963 |
| 200nTl | 119 | 199.9718 | -26,285.0 | --- | 397.0 ns | 5+ | γ→200Tl(100%) | 1972 |
| 201Tl | 120 | 200.9708 | -27,181.0 | --- | 3.04 d | 1/2+ | EC→201Hg(100%) | 1950 |
| 201mTl | 120 | 200.9718 | -26,262.0 | --- | 2.01 ms | 9/2- | γ→201Tl(100%) | 1962 |
| 202Tl | 121 | 201.9721 | -25,980.4 | --- | 12.31 d | 2- | EC→202Hg(100%) | 1940 |
| 202mTl | 121 | 201.9731 | -25,030.2 | --- | 591.0 µs | 7+ | γ→202Tl(100%) | 1958 |
| 203mTl | 122 | 202.9739 | -24,277.6 | --- | --- | (9/2-) | γ→203Tl(100%) | 2020 |
| 203nTl | 122 | 202.9762 | -22,200.0 | --- | 7.7 µs | (25/2+) | γ→203Tl(100%) | 1998 |
| 204Tl | 123 | 203.9739 | -24,346.1 | --- | 3.78 y | 2- | β⁻→204Pb(97.08%) ECβ⁺→204Hg(2.92%) | 1953 |
| 204mTl | 123 | 203.975 | -23,242.0 | --- | 61.7 µs | 7+ | γ→204Tl(100%) | 1972 |
| 204nTl | 123 | 203.9764 | -22,027.1 | --- | 2.6 µs | 12- | γ→204Tl(100%) | 1998 |
| 205mTl | 124 | 204.978 | -20,530.2 | --- | 2.6 µs | 25/2+ | γ→205Tl(100%) | 1976 |
| 205nTl | 124 | 204.9796 | -18,985.2 | --- | 235.0 ns | (35/2-) | γ→205Tl(100%) | 2004 |
| 206Tl | 125 | 205.9761 | -22,253.3 | --- | 4.2 m | 0- | β⁻→206Pb(100%) | 1935 |
| 206mTl | 125 | 205.9789 | -19,610.2 | --- | 3.74 m | (12-) | γ→206Tl(100%) | 1976 |
| 207Tl | 126 | 206.9774 | -21,034.0 | --- | 4.77 m | 1/2+ | β⁻→207Pb(100%) | 1908 |
| 207mTl | 126 | 206.9789 | -19,686.0 | --- | 1.33 s | 11/2- | γ→207Tl(100%) β⁻→207Pb | 1965 |
| 208Tl | 127 | 207.982 | -16,750.1 | --- | 3.05 m | 5+ | β⁻→208Pb(100%) | 1909 |
| 208mTl | 127 | 207.984 | -14,943.1 | --- | 1.3 µs | (0-) | γ→208Tl(100%) | 2020 |
| 209Tl | 128 | 208.9854 | -13,645.0 | --- | 2.16 m | 1/2+ | β⁻→209Pb(100%) β⁻n→208Pb | 1950 |
| 209mTl | 128 | 208.9867 | -12,417.0 | --- | 146.0 ns | 17/2+ | γ→209Tl(100%) | 2009 |
| 210Tl | 129 | 209.9901 | -9,247.0 | --- | 1.3 m | (5+) | β⁻→210Pb(99.991%) β⁻n→209Pb(0.009%) | 1909 |
| 210mTl | 129 | 209.9914 | -8,050.0 | --- | 1.0 m | 9+ | β⁻→210Pb γ→210Tl | 2018 |
| 211Tl | 130 | 210.9935 | -6,080.0 | --- | 1.35 m | 1/2+ | β⁻→211Pb(97.8%) β⁻n→210Pb(2.2%) | 1998 |
| 211mTl | 130 | 210.9948 | -4,840.0 | --- | 580.0 ns | (17/2+) | γ→211Tl(100%) | 2019 |
| 212Tl | 131 | 211.9983 | -1,550.0 | --- | 31.0 s | (5+) | β⁻→212Pb(98.2%) β⁻n→211Pb(1.8%) | 1998 |
| 213Tl | 132 | 213.0019 | 1,784.0 | --- | 23.8 s | (1/2+) | β⁻→213Pb(92.4%) β⁻n→212Pb(7.6%) | 2010 |
| 213mTl | 132 | 213.0026 | 2,460.0 | --- | 4.1 µs | --- | γ→213Tl(100%) | 2019 |
| 213nTl | 132 | 213.0033 | 3,030.0 | --- | 600.0 ns | (17/2+) | γ→213Tl(100%) | 2019 |
| 214Tl | 133 | 214.0069 | 6,470.0 | --- | 11.0 s | (5+) | β⁻→214Pb(66%) β⁻n→213Pb(34%) | 2010 |
| 215Tl | 134 | 215.0108 | 10,030.0 | --- | 9.7 s | (1/2+) | β⁻→215Pb(95.4%) β⁻n→214Pb(4.6%) | 2010 |
| 216Tl | 135 | 216.016 | 14,870.0 | --- | 5.9 s | (5+) | β⁻→216Pb(100%) β⁻n→215Pb(<11.5%) | 2010 |
| 217Tl | 136 | 217.02 | 18,660.0 | --- | 2.0 s | (1/2+) | β⁻→217Pb β⁻n→216Pb | 2010 |
| 218Tl | 137 | 218.0255 | 23,710.0 | --- | 1.0 s | (6+) | β⁻→218Pb β⁻n→217Pb | --- |