Isotopes of mercury

There are seven stable isotopes of mercury (80Hg) with 202Hg being the most abundant (29.86%). The longest-lived radioisotopes are 194Hg with a half-life of 444 years, and 203Hg with a half-life of 46.612 days. Most of the remaining 40 radioisotopes have half-lives that are less than a day. 199Hg and 201Hg are the most often studied NMR-active nuclei, having spin quantum numbers of 1/2 and 3/2 respectively. All isotopes of mercury are either radioactive or observationally stable, meaning that they are predicted to be radioactive but no actual decay has been observed. These isotopes are predicted to undergo either alpha decay or double beta decay.

List of isotopes

 * 170Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 90
 * 80(+400-40) μs
 * α
 * 166Pt
 * 0+
 * 171Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 91
 * 171.00376(32)#
 * 80(30) μs [59(+36−16) μs]
 * α
 * 167Pt
 * 3/2−#
 * 172Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 92
 * 171.99883(22)
 * 420(240) μs [0.25(+35−9) ms]
 * α
 * 168Pt
 * 0+
 * 173Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 93
 * 172.99724(22)#
 * 1.1(4) ms [0.6(+5−2) ms]
 * α
 * 169Pt
 * 3/2−#
 * 174Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 94
 * 173.992864(21)
 * 2.0(4) ms [2.1(+18−7) ms]
 * α
 * 170Pt
 * 0+
 * 175Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 95
 * 174.99142(11)
 * 10.8(4) ms
 * α
 * 171Pt
 * 5/2−#
 * rowspan=2|176Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 96
 * rowspan=2|175.987355(15)
 * rowspan=2|20.4(15) ms
 * α (98.6%)
 * 172Pt
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * β+ (1.4%)
 * 176Au
 * rowspan=2|177Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 97
 * rowspan=2|176.98628(8)
 * rowspan=2|127.3(18) ms
 * α (85%)
 * 173Pt
 * rowspan=2|5/2−#
 * rowspan=2|
 * rowspan=2|
 * β+ (15%)
 * 177Au
 * rowspan=2|178Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 98
 * rowspan=2|177.982483(14)
 * rowspan=2|0.269(3) s
 * α (70%)
 * 174Pt
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * β+ (30%)
 * 178Au
 * rowspan=3|179Hg
 * rowspan=3 style="text-align:right" | 80
 * rowspan=3 style="text-align:right" | 99
 * rowspan=3|178.981834(29)
 * rowspan=3|1.09(4) s
 * α (53%)
 * 175Pt
 * rowspan=3|5/2−#
 * rowspan=3|
 * rowspan=3|
 * β+ (47%)
 * 179Au
 * β+, p (.15%)
 * 178Pt
 * rowspan=2|180Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 100
 * rowspan=2|179.978266(15)
 * rowspan=2|2.58(1) s
 * β+ (52%)
 * 180Au
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * α (48%)
 * 176Pt
 * rowspan=4|181Hg
 * rowspan=4 style="text-align:right" | 80
 * rowspan=4 style="text-align:right" | 101
 * rowspan=4|180.977819(17)
 * rowspan=4|3.6(1) s
 * β+ (64%)
 * 181Au
 * rowspan=4|1/2(−)
 * rowspan=4|
 * rowspan=4|
 * α (36%)
 * 177Pt
 * β+, p (.014%)
 * 180Pt
 * β+, α (9×10−6%)
 * 177Ir
 * style="text-indent:1em" | 181mHg
 * colspan="3" style="text-indent:2em" | 210(40)# keV
 * 13/2+
 * rowspan=3|182Hg
 * rowspan=3 style="text-align:right" | 80
 * rowspan=3 style="text-align:right" | 102
 * rowspan=3|181.97469(1)
 * rowspan=3|10.83(6) s
 * β+ (84.8%)
 * 182Au
 * rowspan=3|0+
 * rowspan=3|
 * rowspan=3|
 * α (15.2%)
 * 178Pt
 * β+, p (10−5%)
 * 181Pt
 * rowspan=3|183Hg
 * rowspan=3 style="text-align:right" | 80
 * rowspan=3 style="text-align:right" | 103
 * rowspan=3|182.974450(9)
 * rowspan=3|9.4(7) s
 * β+ (74.5%)
 * 183Au
 * rowspan=3|1/2−
 * rowspan=3|
 * rowspan=3|
 * α (25.5%)
 * 179Pt
 * β+, p (5.6×10−4%)
 * 182Pt
 * style="text-indent:1em" | 183m1Hg
 * colspan="3" style="text-indent:2em" | 198(14) keV
 * 13/2+#
 * style="text-indent:1em" | 183m2Hg
 * colspan="3" style="text-indent:2em" | 240(40)# keV
 * 5# s
 * β+
 * 183Au
 * 13/2+#
 * rowspan=2|184Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 104
 * rowspan=2|183.971713(11)
 * rowspan=2|30.6(3) s
 * β+ (98.89%)
 * 184Au
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * α (1.11%)
 * 180Pt
 * rowspan=2|185Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 105
 * rowspan=2|184.971899(17)
 * rowspan=2|49.1(10) s
 * β+ (94%)
 * 185Au
 * rowspan=2|1/2−
 * rowspan=2|
 * rowspan=2|
 * α (6%)
 * 181Pt
 * rowspan=3 style="text-indent:1em" | 185mHg
 * rowspan=3 colspan="3" style="text-indent:2em" | 99.3(5) keV
 * rowspan=3|21.6(15) s
 * IT (54%)
 * 185Hg
 * rowspan=3|13/2+
 * rowspan=3|
 * rowspan=3|
 * β+ (46%)
 * 185Au
 * α (.03%)
 * 181Pt
 * rowspan=2|186Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 106
 * rowspan=2|185.969362(12)
 * rowspan=2|1.38(6) min
 * β+ (99.92%)
 * 186Au
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * α (.016%)
 * 182Pt
 * style="text-indent:1em" | 186mHg
 * colspan="3" style="text-indent:2em" | 2217.3(4) keV
 * 82(5) μs
 * (8−)
 * rowspan=2|187Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 107
 * rowspan=2|186.969814(15)
 * rowspan=2|1.9(3) min
 * β+
 * 187Au
 * rowspan=2|3/2−
 * rowspan=2|
 * rowspan=2|
 * α (1.2×10−4%)
 * 183Pt
 * rowspan=2 style="text-indent:1em" | 187mHg
 * rowspan=2 colspan="3" style="text-indent:2em" | 59(16) keV
 * rowspan=2|2.4(3) min
 * β+
 * 187Au
 * rowspan=2|13/2+
 * rowspan=2|
 * rowspan=2|
 * α (2.5×10−4%)
 * 183Pt
 * rowspan=2|188Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 108
 * rowspan=2|187.967577(12)
 * rowspan=2|3.25(15) min
 * β+
 * 188Au
 * rowspan=2|0+
 * rowspan=2|
 * rowspan=2|
 * α (3.7×10−5%)
 * 184Pt
 * style="text-indent:1em" | 188mHg
 * colspan="3" style="text-indent:2em" | 2724.3(4) keV
 * 134(15) ns
 * (12+)
 * rowspan=2|189Hg
 * rowspan=2 style="text-align:right" | 80
 * rowspan=2 style="text-align:right" | 109
 * rowspan=2|188.96819(4)
 * rowspan=2|7.6(1) min
 * β+
 * 189Au
 * rowspan=2|3/2−
 * rowspan=2|
 * rowspan=2|
 * α (3×10−5%)
 * 185Pt
 * rowspan=2 style="text-indent:1em" | 189mHg
 * rowspan=2 colspan="3" style="text-indent:2em" | 80(30) keV
 * rowspan=2|8.6(1) min
 * β+
 * 189Au
 * rowspan=2|13/2+
 * rowspan=2|
 * rowspan=2|
 * α (3×10−5%)
 * 185Pt
 * 190Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 110
 * 189.966322(17)
 * 20.0(5) min
 * β+
 * 190Au
 * 0+
 * 191Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 111
 * 190.967157(24)
 * 49(10) min
 * β+
 * 191Au
 * 3/2(−)
 * style="text-indent:1em" | 191mHg
 * colspan="3" style="text-indent:2em" | 128(22) keV
 * 50.8(15) min
 * β+
 * 191Au
 * 13/2+
 * 192Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 112
 * 191.965634(17)
 * 4.85(20) h
 * EC
 * 192Au
 * 0+
 * 193Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 113
 * 192.966665(17)
 * 3.80(15) h
 * β+
 * 193Au
 * 3/2−
 * rowspan=2 style="text-indent:1em" | 193mHg
 * rowspan=2 colspan="3" style="text-indent:2em" | 140.76(5) keV
 * rowspan=2|11.8(2) h
 * β+ (92.9%)
 * 193Au
 * rowspan=2|13/2+
 * rowspan=2|
 * rowspan=2|
 * IT (7.1%)
 * 193Hg
 * 194Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 114
 * 193.965439(13)
 * 444(77) y
 * EC
 * 194Au
 * 0+
 * 195Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 115
 * 194.966720(25)
 * 10.53(3) h
 * β+
 * 195Au
 * 1/2−
 * rowspan=2 style="text-indent:1em" | 195mHg
 * rowspan=2 colspan="3" style="text-indent:2em" | 176.07(4) keV
 * rowspan=2|41.6(8) h
 * IT (54.2%)
 * 195Hg
 * rowspan=2|13/2+
 * rowspan=2|
 * rowspan=2|
 * β+ (45.8%)
 * 195Au
 * 196Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 116
 * 195.965833(3)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.0015(1)
 * 197Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 117
 * 196.967213(3)
 * 64.14(5) h
 * EC
 * 197Au
 * 1/2−
 * rowspan=2 style="text-indent:1em" | 197mHg
 * rowspan=2 colspan="3" style="text-indent:2em" | 298.93(8) keV
 * rowspan=2|23.8(1) h
 * IT (91.4%)
 * 197Hg
 * rowspan=2|13/2+
 * rowspan=2|
 * rowspan=2|
 * EC (8.6%)
 * 197Au
 * 198Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 118
 * 197.9667690(4)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.0997(20)
 * 199Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 119
 * 198.9682799(4)
 * colspan=3 align=center|Observationally Stable
 * 1/2−
 * 0.1687(22)
 * style="text-indent:1em" | 199mHg
 * colspan="3" style="text-indent:2em" | 532.48(10) keV
 * 42.66(8) min
 * IT
 * 199Hg
 * 13/2+
 * 200Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 120
 * 199.9683260(4)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.2310(19)
 * 201Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 121
 * 200.9703023(6)
 * colspan=3 align=center|Observationally Stable
 * 3/2−
 * 0.1318(9)
 * style="text-indent:1em" | 201mHg
 * colspan="3" style="text-indent:2em" | 766.22(15) keV
 * 94(3) μs
 * 13/2+
 * 202Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 122
 * 201.9706430(6)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.2986(26)
 * 203Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 123
 * 202.9728725(18)
 * 46.595(6) d
 * β−
 * 203Tl
 * 5/2−
 * style="text-indent:1em" | 203mHg
 * colspan="3" style="text-indent:2em" | 933.14(23) keV
 * 24(4) μs
 * (13/2+)
 * 204Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 124
 * 203.9734939(4)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.0687(15)
 * 205Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 125
 * 204.976073(4)
 * 5.14(9) min
 * β−
 * 205Tl
 * 1/2−
 * style="text-indent:1em" | 205mHg
 * colspan="3" style="text-indent:2em" | 1556.40(17) keV
 * 1.09(4) ms
 * IT
 * 205Hg
 * 13/2+
 * 206Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 126
 * 205.977514(22)
 * 8.15(10) min
 * β−
 * 206Tl
 * 0+
 * Trace
 * 207Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 127
 * 206.98259(16)
 * 2.9(2) min
 * β−
 * 207Tl
 * (9/2+)
 * 208Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 128
 * 207.98594(32)#
 * 42(5) min [41(+5−4) min]
 * β−
 * 208Tl
 * 0+
 * 209Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 129
 * 208.99104(21)#
 * 37(8) s
 * 9/2+#
 * 210Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 130
 * 209.99451(32)#
 * 10# min [>300 ns]
 * 0+
 * 211Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 131
 * 210.99380(200)#
 * 26(8) s
 * 9/2+#
 * 212Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 132
 * 212.02760(300)#
 * 1# min [>300 ns]
 * 0+
 * 213Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 133
 * 213.07670(300)#
 * 1# s [>300 ns]
 * 5/2+#
 * 214Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 134
 * 214.11180(400)#
 * 1# s [>300 ns]
 * 0+
 * 215Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 135
 * 215.16210(400)#
 * 1# s [>300 ns]
 * 3/2+#
 * 216Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * 201Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 121
 * 200.9703023(6)
 * colspan=3 align=center|Observationally Stable
 * 3/2−
 * 0.1318(9)
 * style="text-indent:1em" | 201mHg
 * colspan="3" style="text-indent:2em" | 766.22(15) keV
 * 94(3) μs
 * 13/2+
 * 202Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 122
 * 201.9706430(6)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.2986(26)
 * 203Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 123
 * 202.9728725(18)
 * 46.595(6) d
 * β−
 * 203Tl
 * 5/2−
 * style="text-indent:1em" | 203mHg
 * colspan="3" style="text-indent:2em" | 933.14(23) keV
 * 24(4) μs
 * (13/2+)
 * 204Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 124
 * 203.9734939(4)
 * colspan=3 align=center|Observationally Stable
 * 0+
 * 0.0687(15)
 * 205Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 125
 * 204.976073(4)
 * 5.14(9) min
 * β−
 * 205Tl
 * 1/2−
 * style="text-indent:1em" | 205mHg
 * colspan="3" style="text-indent:2em" | 1556.40(17) keV
 * 1.09(4) ms
 * IT
 * 205Hg
 * 13/2+
 * 206Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 126
 * 205.977514(22)
 * 8.15(10) min
 * β−
 * 206Tl
 * 0+
 * Trace
 * 207Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 127
 * 206.98259(16)
 * 2.9(2) min
 * β−
 * 207Tl
 * (9/2+)
 * 208Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 128
 * 207.98594(32)#
 * 42(5) min [41(+5−4) min]
 * β−
 * 208Tl
 * 0+
 * 209Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 129
 * 208.99104(21)#
 * 37(8) s
 * 9/2+#
 * 210Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 130
 * 209.99451(32)#
 * 10# min [>300 ns]
 * 0+
 * 211Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 131
 * 210.99380(200)#
 * 26(8) s
 * 9/2+#
 * 212Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 132
 * 212.02760(300)#
 * 1# min [>300 ns]
 * 0+
 * 213Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 133
 * 213.07670(300)#
 * 1# s [>300 ns]
 * 5/2+#
 * 214Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 134
 * 214.11180(400)#
 * 1# s [>300 ns]
 * 0+
 * 215Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 135
 * 215.16210(400)#
 * 1# s [>300 ns]
 * 3/2+#
 * 216Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * style="text-align:right" | 130
 * 209.99451(32)#
 * 10# min [>300 ns]
 * 0+
 * 211Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 131
 * 210.99380(200)#
 * 26(8) s
 * 9/2+#
 * 212Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 132
 * 212.02760(300)#
 * 1# min [>300 ns]
 * 0+
 * 213Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 133
 * 213.07670(300)#
 * 1# s [>300 ns]
 * 5/2+#
 * 214Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 134
 * 214.11180(400)#
 * 1# s [>300 ns]
 * 0+
 * 215Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 135
 * 215.16210(400)#
 * 1# s [>300 ns]
 * 3/2+#
 * 216Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * 214Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 134
 * 214.11180(400)#
 * 1# s [>300 ns]
 * 0+
 * 215Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 135
 * 215.16210(400)#
 * 1# s [>300 ns]
 * 3/2+#
 * 216Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * 3/2+#
 * 216Hg
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * style="text-align:right" | 80
 * style="text-align:right" | 136
 * 216.19860(400)#
 * 100# ms [>300 ns]
 * 0+
 * 0+
 * 0+