List of radioactive nuclides by half-life

This is a list of radioactive nuclides (sometimes also called isotopes), ordered by half-life from shortest to longest, in seconds, minutes, hours, days and years. Current methods make it difficult to measure half-lives between approximately 10−19 and 10−10 seconds.[1]

10−24 seconds (yoctoseconds)

isotope half-life
10−24 seconds
hydrogen-5 86(6)
lithium-4 91(9)
hydrogen-4 139(10)
nitrogen-10 143(36)
oxygen-11 198(12)
helium-10 260(40)
hydrogen-6 294(67)
lithium-5 370(30)
fluorine-14 500(60)
boron-7 570(14)
nitrogen-11 585(7)
helium-5 602(22)
beryllium-16 650(130)
hydrogen-7 652(558)
nitrogen-11m 690(80)
boron-21 > 760
neon-15 770(300)
beryllium-15 790(270)
boron-20 > 912.4
beryllium-11m 930(130)

Twenty-three yoctoseconds is the time needed to traverse a 7-femtometre distance at the speed of light—around the diameter of a large atomic nucleus.

10−21 seconds (zeptoseconds)

isotope half-life
10−21 seconds
beryllium-13 1.0
fluorine-15 1.11
oxygen-12 1.14
sodium-18 1.34
lithium-10m2 1.35
lithium-10 2.0
beryllium-13 2.7
helium-7 2.51
lithium-13 3.3
carbon-8 3.5
lithium-10m1 3.7
neon-16 3.74
boron-14m 4.15
boron-16 >4.6
beryllium-6 5.0
helium-9 7
fluorine-16 11
boron-9 845

10−18 seconds (attoseconds)

isotope half-life
10−18 seconds
nitrogen-9 <1
sodium-19 <1
beryllium-9m 1.25
lithium-6m 56
beryllium-8 81.9

10−12 seconds (picoseconds)

isotope half-life
10−12 seconds
oxygen-26 4.2
magnesium-19 5(3)
argon-30 <10
potassium-31 <10
sodium-22m2 19.6
boron-16 ≤190

10−9 seconds (nanoseconds)

isotope half-life
10−9 seconds
helium-2 <1
lithium-12 <10
boron-18 26
carbon-21 30
fluorine-28 40
oxygen-26 40
sodium-19 40
oxygen-25 50
nitrogen-24 52
protactinium-219 53
neon-34 60
sodium-37 60
protactinium-220m2 69
actinium-217 69
francium-215 86
lead-196m1 <100
uranium-236m1 100
bismuth-199m2 100
oxygen-28 100
curium-247m2 100.6
actinium-218m 103
francium-214m2 103
bismuth-201m3 105
lead-202m3 107
francium-214m3 108
thorium-218 109
lead-202m2 110
neptunium-238m 112
polonium-205m4 115
bismuth-201m2 118
uranium-236m2 120
lead-203m3 122
bismuth-201m4 124
astatine-213 125
lead-193m2 135
lead-198m2 137
lead-196m3 140
lead-190m1 150
thallium-198m2 150
americium-239m 163
lead-192m1 164
bismuth-199m3 168
neon-33 180
sodium-36 180
curium-242m 180
radium-216 182
plutonium-239m1 193
bismuth-203m2 194
polonium-198m1 200
polonium-202m >200
neodymium-126 >200
polonium-203m2 >200
lead-210m 201
lead-206m2 202
bismuth-197m2 204
polonium-207m1 205
bismuth-197m5 209
lead-198m3 212
lead-205m3 217
polonium-206m1 222
beryllium-12m 233
thallium-205m2 235
polonium-211m2 243
radon-214m 245
fluorine-31 250
uranium-239m1 >250
bismuth-197m4 253
fluorine-30 260
nitrogen-25 260
polonium-210m 263
bismuth-197m3 263
lead-204m1 265
astatine-214m1 265
radium-208m 270
lead-196m4 270
radon-214 270
uranium-238m 280
curium-245m 290
thallium-192m2 296
polonium-212 299
protactinium-220m1 308
bismuth-202m2 310
polonium-205m1 310
plutonium-243m 330
thallium-200m2 330
neptunium-222 380
lead-216m 400
astatine-206m 410
protactinium-229m 420
lead-204m3 450
lead-208m 500
bismuth-190m2 >500
curium-244m2 >500
lead-201m2 508
radium-215m3 555
astatine-214 558
berkelium-242m 600
thorium-216m2 615
radon-210m1 644
uranium-221 660
francium-216 700
actinium-217m 740
bismuth-195m2 750
polonium-198m2 750
lead-192m3 756
astatine-214m2 760
protactinium-220 780
uranium-239m2 780
lead-188m2 797
lead-188m1 830
radium-212m2 850
polonium-196m 850
bismuth-189m2 880
plutonium-241m1 880

10−6 seconds (microseconds)

isotope half-life
10−6 seconds
lead-196m2 <1
polonium-192m ~1
radon-210m3 1.04
thorium-219 1.05
polonium-206m2 1.05
radon-210m2 1.06
curium-243m 1.08
actinium-218 1.08
lead-192m2 1.1
plutonium-237m2 1.1
lead-197m2 1.15
americium-241m 1.2
radium-215m2 1.39
bismuth-211m 1.4
uranium-222 1.4
radium-217 1.63
neptunium-223 2.15
radium-210m 2.24
radon-215 2.30
bismuth-217m 2.70
polonium-211m3 2.8
radon-209m2 3.0
bismuth-202m1 3.04
polonium-213 3.65
lead-198m1 4.19
protactinium-221 4.9
astatine-210m2 5.66
nobelium-250 5.7
lead-212m 6.0
lead-214m 6.2
bismuth-187m2 7
thorium-229m 7
radium-215m1 7.1
lead-190m3 7.2
plutonium-239m2 7.5
bismuth-206m1 7.7
astatine-205m 7.76
thorium-220 9.7
lead-195m2 10.0
lead-199m2 10.1
radium-212m1 10.9
astatine-196m2 11
actinium-219 11.8
radon-209m1 13.4
polonium-194m 15
caesium-113 16.7(7)
francium-217 16.8
uranium-223 21
plutonium-241m2 21
fermium-251m 21.1
curium-249m 23
rutherfordium-254 23
lead-205m1 24.2
neptunium-220 25
lead-190m2 25
radium-218 25.2
lead-189m2 26
curium-247m1 26.3
berkelium-250m1 29
nobelium-253m 31
polonium-186 34
americium-238m 35
nobelium-250m 36
neptunium-224 38
californium-249m 45
radon-216 45
rutherfordium-253 48
bismuth-185m 49
polonium-207m2 49
radium-231m ~53
uranium-219 55
berkelium-251m 58
americium-246m2 73
seaborgium-261m 92
astatine-215 100
astatine-216m 100
protactinium-218 113
lead-206m1 125
thorium-216m1 137
curium-248m 146
neptunium-219 150
astatine-212m2 152
polonium-214 164.3
radon-207m 181
bismuth-207m 182
darmstadtium-270 205
berkelium-250m2 213
darmstadtium-269 230
lead-178 230
copernicium-277 240
thorium-217 240
darmstadtium-273 240
berkelium-249m 300
astatine-216 300
bismuth-187m1 320
nihonium-278 340
hassium-265m 360
fermium-258 370
polonium-188 430
actinium-216 440
actinium-216m 443
astatine-210m1 482
caesium-112 500(100)
polonium-187m 500
hassium-264 540
radon-217 540
polonium-205m2 645
copernicium-277 690
oganesson-294 690
fermium-241 730
hassium-263 760
fermium-242 800
bismuth-206m2 890
mendelevium-245 900
copernicium-282 910
uranium-224 940

10−3 seconds (milliseconds)

isotope half-life
10−3 seconds
francium-218 1.0
bismuth-204m2 1.07
protactinium-217m 1.08
meitnerium-266 1.2
nobelium-258 1.2
uranium-216m 1.31
polonium-187 1.40
nihonium-278 1.4
sodium-35 1.5
radium-215 1.55
darmstadtium-271m 1.7
astatine-191 1.7
thorium-208 1.7
thorium-221 1.73
polonium-215 1.781
hassium-265 1.96
bismuth-185 2
roentgenium-272 2
astatine-191m 2.1
radium-213m 2.1
thorium-222 2.237
uranium-215 2.24
polonium-190 2.46
fluorine-29 2.5
flerovium-284 2.5
bismuth-208m 2.58
radium-202 2.6
boron-19 2.92
seaborgium-258 3
hassium-266 3.02
fermium-244 3.12
protactinium-222 3.2
francium-214m1 3.35
neon-31 3.4
protactinium-217 3.48
neon-32 3.5
darmstadtium-277 3.5
protactinium-211 3.8
lead-179 3.9
roentgenium-278 4
radium-203 4
seaborgium-260 4
uranium-216 4.3
beryllium-14 4.35
lead-180 4.5
radon-196 4.7
fluorine-27 5
bismuth-189m1 5.0
francium-214 5.0
meitnerium-277 5
nobelium-262 5
polonium-189 5
boron-17 5.08
protactinium-223 5.1
americium-223 5.2
sodium-34 5.5
lead-205m2 5.55
neptunium-225 6
uranium-218 6
radon-195 6
radon-195m 6
carbon-22 6.2
meitnerium-270 6.3
rutherfordium-256 6.4
bismuth-184 6.6
thorium-209 7
protactinium-213 7
seaborgium-262 7
neon-30 7.3
protactinium-212 8
sodium-33 8
magnesium-37 8
livermorium-290 8.3
oxygen-13 8.58
lithium-11 8.59
fluorine-26 9.6
bohrium-262m 9.6
thorium-207 9.7
bismuth-186m 9.8
boron-15 9.87
darmstadtium-270m 10
radium-219 10
hassium-277 11
nitrogen-12 11
astatine-192 11.5
bohrium-261 11.8
roentgenium-274 12
boron-14 12.5
bismuth-204m1 13.0
livermorium-292 13
bismuth-184m 13
sodium-32 13.2
americium-242m2 14.0
protactinium-215 14
nitrogen-23 14.5
rutherfordium-258 14.7
bismuth-186 14.8
neon-29 14.8
actinium-206m1 15
carbon-20 16
francium-199 16
protactinium-214 17
sodium-31 17
thorium-210 17
boron-13 17.33
radium-220 17.9
neon-28 18.9
livermorium-291 19
radon-213 19.5
actinium-205 20
astatine-196m1 20
rutherfordium-270 20
francium-219 20
meitnerium-275 20
boron-12 20.2
radon-197m 21
rutherfordium-260 21
astatine-193m1 21
californium-238 21.1
beryllium-12 21.49
francium-218m1 22.0
tennessine-293 22
polonium-191 22
francium-200 24
nitrogen-22 24
actinium-206 25
uranium-217 26
actinium-220 26.36
thorium-216 26.8
meitnerium-268 27
astatine-193m2 27
lawrencium-251 27
actinium-208m 28
astatine-193 28
manganese-68 28
sodium-28 30.5
actinium-207 31
neon-27 32
bismuth-187 32
polonium-192 32.2
astatine-217 32.3
uranium-234m 33.5
curium-244m1 34
bohrium-260 35
radon-218 35
neptunium-226 35
thorium-212 36
moscovium-287 37
seaborgium-264 37
dubnium-255 37
actinium-206m2 41
radium-203m 41
bismuth-188 44
sodium-29 44.9
lead-181 45
carbon-19 46.2
thorium-211 48
sodium-30 48.4
fluorine-25 50
tennessine-294 51
actinium-221 52
hassium-267 55
radium-207m 57
livermorium-293 57
polonium-205m3 57.4
radium-204 60
lead-182 60
uranium-225 61
oxygen-24 65
radon-198 65
radon-197 66
francium-201 67
nihonium-282 73
nihonium-283 75
oxygen-23 82
bohrium-262 84
nitrogen-21 87
astatine-192m 88
darmstadtium-271 90
roentgenium-279 90
carbon-18 92
actinium-209 92
polonium-191m 93
actinium-208 97
copernicium-284 98
thorium-214 100
flerovium-285 100
protactinium-216 105
nobelium-260 106
astatine-204m 108
astatine-212m1 119
helium-8 119
flerovium-286 120
seaborgium-263m 120
bismuth-191m 124
carbon-9 126.5
nitrogen-20 130
thorium-213 140
polonium-216 145
astatine-195m 147
moscovium-288 164
actinium-215 170
lithium-9 178.3
copernicium-281 180
radium-205m 180
plutonium-237m1 180
neon-26 192
carbon-17 193
mendelevium-247m 200
seaborgium-261 200
darmstadtium-279 210
actinium-211 213
bismuth-188m 220
radium-205 220
fermium-243 231
polonium-193m 240
radium-206 240
astatine-196 253
uranium-226 269
nitrogen-19 271
hassium-266m 280
nobelium-254m 280
astatine-194 286
hassium-275 290
francium-202 290
sodium-27 301
bismuth-203m1 303
astatine-212 314
radon-199m 320
astatine-194m 323
astatine-195 328
moscovium-289 330
francium-202m 340
actinium-210 350
seaborgium-266 360
astatine-197 388
fluorine-24 390
lawrencium-252 390
polonium-194 392
bismuth-200m2 400
mendelevium-245m 400
mendelevium-244 400
lead-183m 415
polonium-193 420
meitnerium-274 440
sodium-20 447.9
meitnerium-276 450
astatine-202m2 460
flerovium-287 480
lead-203m2 480
lead-184 490
hassium-273 510
neptunium-227 510
dubnium-259 510
polonium-211 516
lead-183 535
francium-203 550
lawrencium-253 580
thorium-223 600
bismuth-196m1 600
seaborgium-259 600
neon-25 602
radon-199 620
nitrogen-18 622
lawrencium-257 646
moscovium-290 650
francium-200m 650
flerovium-288 660
dubnium-257m 670
bismuth-189 674
francium-206m2 700
actinium-213 731
carbon-16 747
boron-8 770
nobelium-251 780
lead-207m 806
helium-6 806.7
lithium-8 839.9
protactinium-224 844
bohrium-265 900
bohrium-266 900
lutetium-153 900
nihonium-284 910
actinium-212 920
radon-200 960
bohrium-264 970

100 seconds

isotope half-life
seconds
seaborgium-263 1
astatine-198m 1.0
mendelevium-246 1.0
thorium-224 1.05
sodium-26 1.077
plutonium-228 1.1
mendelevium-247 1.12
curium-246m 1.12
bohrium-271 1.2
thorium-215 1.2
radium-208 1.3
radium-207 1.3
rutherfordium-268 1.4
hassium-268 1.42
polonium-217 1.47
astatine-218 1.5
lawrencium-253m 1.5
fermium-259 1.5
dubnium-260 1.52
dubnium-257 1.53
fermium-246 1.54
neon-18 1.672
francium-204 1.7
francium-204m2 1.7
nobelium-251m 1.7
protactinium-225 1.7
americium-229 1.8
flerovium-289 1.9
dubnium-256 1.9
mendelevium-249m 1.9
dubnium-258m 1.9
polonium-195m 1.92
fermium-250m 1.92
astatine-197m 2.0
californium-237 2.1
fluorine-23 2.23
oxygen-22 2.25
nobelium-252 2.27
rutherfordium-255 2.3
rutherfordium-262 2.3
carbon-15 2.449
radium-214 2.46
rutherfordium-259m 2.5
francium-204m1 2.6
radium-213 2.74
polonium-207m3 2.79
nobelium-256 2.91
bismuth-193m 3.2
rutherfordium-259 3.2
oxygen-21 3.42
astatine-200m2 3.5
radium-210 3.7
francium-205 3.80
radon-201m 3.8
radon-219 3.96
rutherfordium-261m 4
lead-185m 4.07
rutherfordium-257m 4.1
lawrencium-258 4.1
fluorine-21 4.158
nitrogen-17 4.173
copernicium-283 4.2
astatine-198 4.2
nihonium-285 4.2
fermium-245 4.2
fluorine-22 4.23
meitnerium-278 4.5
dubnium-258 4.5
dubnium-261 4.5
roentgenium-280 4.6
radium-209 4.6
polonium-195 4.64
rutherfordium-257 4.7
lead-186 4.82
actinium-222 5.0
francium-232 5
polonium-196 5.56
einsteinium-240 6
lawrencium-259 6.2
bismuth-190m1 6.2
lead-203m1 6.21
bismuth-190 6.3
lead-185 6.3
astatine-199 6.92
radon-201 7.0
mendelevium-248 7
nitrogen-16 7.13
bismuth-198m2 7.7
meitnerium-278 8
seaborgium-265 8
actinium-214 8.2
bismuth-219 8.7
hassium-270 9
bismuth-220 9.5
nihonium-286 9.5
radon-202 9.94
bohrium-272 10
hassium-271 10
einsteinium-241 10
fluorine-20 11.07
radon-229 12
bismuth-191 12.3
darmstadtium-281 12.7
radium-212 13.0
radium-211 13
lawrencium-254 13
einsteinium-242 13.5
oxygen-20 13.51
beryllium-11 13.81
darmstadtium-281 14
francium-207 14.8
lead-218 15
lead-187 15.2
francium-206m1 15.9
francium-206 16
hassium-269 16
seaborgium-265m 16.2
bohrium-267 17
roentgenium-281 17
neon-19 17.22
francium-231 17.6
lead-187m 18.3
berkelium-234 19
francium-230 19.1
carbon-10 19.29
lead-217 20
radon-227 20.8
einsteinium-243 21
berkelium-233 21
berkelium-236 22
lawrencium-255 22
sodium-21 22.49
rutherfordium-266 23
mendelevium-249 24
nobelium-257 25
polonium-211m1 25.2
lead-188 25.5
polonium-197m 25.8
oxygen-19 26.464
radon-203m 26.7
curium-233 27
lawrencium-256 27
francium-220 27.4
copernicium-285 28
radium-221 28
dubnium-263 29
copernicium-285 30
radium-234 30
radium-233 30
radium-221 30
fermium-247 31
americium-230 32
bismuth-218 33
bismuth-192 34.6
francium-213 34.6
dubnium-262 35
fermium-248 35.1
bismuth-215m 36.9
einsteinium-244 37
neon-23 37.24
radium-222 38.0
francium-228 38
bismuth-192m 39.6
polonium-220 40
bohrium-274 40
astatine-200 43.2
actinium-234 44
radon-203 44.2
polonium-203m1 45
polonium-212m 45.1
hassium-271 46
astatine-200m1 47
francium-226 49
francium-209 50.0
astatine-223 50
francium-229 50.2
lead-189m1 50.5
nobelium-254 51
lead-189 51
curium-234 52
mendelevium-250 52
polonium-197 53.6
astatine-222 54
radon-220 55.6
astatine-219 56
francium-208 59.1
sodium-25 59.1
minutes seconds
californium-239 1.060
actinium-235 1.060
lead-201m1 1.0261
bohrium-270 1.0261
neptunium-228 1.02361.4
actinium-222m 1.0563
californium-240 1.0664
fluorine-17 1.074864.49
radon-228 1.0865
uranium-227 1.166
einsteinium-245 1.166
bismuth-193 1.1267
radon-204 1.1770
protactinium-234m 1.1770
oxygen-14 1.177070.62
lead-190 1.1871
actinium-236 1.2072
rutherfordium-261 1.3078
americium-232 1.3279
lead-191 1.3380
seaborgium-267 1.484
astatine-201 1.4285
bismuth-195m1 1.4587
bismuth-194 1.5895
fermium-249 1.696
nobelium-253 1.6297
bismuth-217 1.64298.5
lead-216 1.6599
roentgenium-282 1.70102
plutonium-230 1.70102
radium-231 1.72103
polonium-198 1.77106
protactinium-226 1.8110
berkelium-252 1.8110
neptunium-243 1.85111
bismuth-194m2 1.92115
actinium-232 1.98119
protactinium-240 2120
plutonium-229 2.0120
actinium-230 2.03122
oxygen-15 2.0373122.24
bismuth-194m1 2.08125
actinium-223 2.10126
bismuth-211 2.14128
bismuth-216 2.17130
lead-191m 2.18131
polonium-221 2.2130
neptunium-242 2.2130
protactinium-238 2.27136
neptunium-244 2.29137
mendelevium-252 2.30138
astatine-221 2.3140
americium-234 2.32139
lead-215 2.34140
berkelium-238 2.40144
bohrium-270 2.4140
seaborgium-271 2.4140
actinium-233 2.42145
francium-227 2.47148
astatine-224 2.5150
lawrencium-260 2.7160
radon-205 2.8170
astatine-202m1 3.03182
bismuth-195 3.05183
astatine-202 3.07184
polonium-218 3.10186
francium-211 3.10186
nobelium-255 3.1190
francium-210 3.18191
americium-233 3.2190
francium-224 3.33200
neon-24 3.38203
californium-242 3.49209
lead-192 3.5210
americium-236 3.6220
astatine-220 3.71223
californium-241 3.78227
radium-229 4.0240
mendelevium-251 4.0240
francium-225 4.0240
neptunium-229 4.0240
bismuth-196m2 4.00240
radium-232 4.2250
polonium-199m 4.17250
einsteinium-247 4.55273
berkelium-241 4.6280
neptunium-230 4.6280
radon-225 4.66280
berkelium-240 4.8290
thorium-237 4.8290
francium-221 4.9290
curium-235 5300
lead-193 5300
bismuth-197m1 5.04302
bismuth-196 5.1310
polonium-199 5.48329
neptunium-242m 5.5330
radon-206 5.67340
titanium-51 5.76346
lead-193m1 5.8350
bismuth-216m 6.6400
curium-236 6.8410
berkelium-242 7.0420
bismuth-212m2 7.0420
thorium-235 7.2430
neptunium-240m 7.22433
astatine-203 7.37442
radon-226 7.4440
actinium-231 7.5450
bismuth-215 7.6460
einsteinium-246 7.7460
lead-197 8.1490
plutonium-231 8.6520
protactinium-237 8.7520
thorium-225 8.72523
polonium-201m 8.9530
protactinium-236 9.1550
polonium-222 9.1550
uranium-228 9.1550
astatine-204 9.2550
radon-207 9.25555
bismuth-197 9.33560
thorium-238 9.4560
copper-62 9.673580.4
seaborgium-267 9.8590
americium-235 9.9590
nitrogen-13 9.965597.9
berkelium-253 10600
mercury-210[2] 10600
mendelevium-254 10600
lead-213 10.2610
bismuth-198 10.3620
polonium-219 10.3620
californium-243 10.7640
polonium-200 11.5690
bismuth-198m1 11.6700
lead-194 12.0720
mendelevium-253 12720
lead-199m1 12.2730
californium-256 12.3740
neptunium-241 13.9830
seaborgium-269 14840
francium-222 14.2850
[free] neutron, 1
0
n
14.692881.5
neptunium-232 14.7880
lead-195m1 15.0900
rutherfordium-263 15900
lead-195 ~15~900
polonium-201 15.3920

103 seconds (kiloseconds)

isotope half-life
minutes 103 seconds
curium-25116.81.01
uranium-24216.81.01
californium-24419.41.16
bismuth-21419.91.19
francium-21220.01.20
curium-237201.2
carbon-1120.3341.2200
plutonium-23320.91.25
thorium-23321.831.310
francium-22322.001.320
americium-24723.01.38
uranium-23923.451.407
radon-21223.91.43
radon-22324.31.46
radon-20824.351.461
protactinium-23524.441.466
bismuth-199m124.701.482
bismuth-212m125.01.50
americium-246m125.01.50
plutonium-23525.31.52
einsteinium-25625.41.52
radon-22125.71.54
americium-244m261.6
uranium-235m261.6
astatine-20526.21.57
lead-21426.81.61
mendelevium-255271.6
bismuth-199271.6
einsteinium-248271.6
mendelevium-254m281.7
radon-20928.51.71
fermium-25030.41.82
thorium-22630.571.834
astatine-20630.61.84
bismuth-200m1311.9
plutonium-23233.72.02
lead-21136.12.17
neptunium-23336.22.17
bismuth-20036.42.18
polonium-20336.72.20
lead-196372.2
chlorine-3837.242.234
thorium-23637.52.25
protactinium-22738.32.30
americium-246392.3
uranium-241[3][4]402.4
radium-22742.22.53
lead-197m142.92.57
lawrencium-261442.6
polonium-20244.72.68
californium-24545.02.70
bismuth-21345.592.735
neptunium-23148.82.93
mercury-191492.9
berkelium-25155.63.34
mendelevium-258m57.03.42
uranium-229583.5
nobelium-259583.5
bismuth-201m159.13.55
hours 103 seconds
dubnium-2701.03.6
bismuth-2121.00923.633
neptunium-2401.0323.72
actinium-2291.0453.76
curium-2491.06923.849
lead-204m21.124.0
gallium-681.12854.063
americium-2371.224.4
mendelevium-2561.2834.62
rutherfordium-2671.34.7
dubnium-2661.334.8
californium-2551.4175.10
lead-1991.505.4
radium-2301.555.6
mendelevium-2591.605.8
americium-2381.635.9
astatine-2081.635.9
polonium-2051.666.0
einsteinium-2491.7036.13
bismuth-2021.726.2
astatine-2071.806.5
bismuth-2011.806.5
protactinium-2391.86.5
fluorine-181.82956.586
americium-2452.057.4
einsteinium-250m2.228.0
radon-2102.48.6
lead-1982.48.6
curium-2382.48.6
curium-2392.59.0
fermium-2562.6279.46
yttrium-852.689.6
actinium-2242.7810.0
californium-2473.1111.2
berkelium-2503.21211.56
fermium-2543.24011.66
lead-2093.25311.71
lead-202m13.5312.7
polonium-2043.5312.7
lawrencium-2623.613
berkelium-2444.3515.7
berkelium-2434.516
dubnium-2674.617
plutonium-2434.95617.84
fermium-2515.3019.1
polonium-2075.8020.9
astatine-2095.4119.5
mendelevium-2575.5219.9
actinium-2286.1322.1
dysprosium-1536.423
protactinium-2346.7024.1
astatine-2117.21425.97
einsteinium-256m7.627
astatine-2108.129
einsteinium-2508.631
plutonium-2348.832
lead-2019.3333.6
americium-24410.136
erbium-16510.3637.3
plutonium-24510.538
lead-21210.6438.3
lawrencium-2661140
bismuth-20411.2240.4
bismuth-20311.7642.3
americium-23911.943
uranium-24014.151
radon-21114.653
sodium-2414.9653.9
americium-24216.0257.7
fermium-25520.0772.3
lead-20021.577
protactinium-2282279
neptunium-236m22.581
berkelium-248m23.785
days 103 seconds
fermium-2521.05891.4
thorium-2311.063491.88
dubnium-2681.283110.9
erbium-1601.191102.9
actinium-2261.2238105.74
protactinium-2321.31113
einsteinium-2511.375118.8
californium-2461.4875128.52
protactinium-2291.50130
einsteinium-2551.6375141.48
berkelium-2461.80156
neptunium-2382.117182.9
americium-2402.117182.9
lead-2032.16138186.743
plutonium-2472.27196
terbium-1532.34202
neptunium-2392.356203.6
gold-1982.695232.8
fermium-2533.00259
gold-1993.169273.8
radium-2243.6319313.80
radon-2223.8235330.35
uranium-2314.16359
iodine-1244.17360
neptunium-2344.4380
calcium-474.536391.9
berkelium-2454.94427
bismuth-2105.012433.0
manganese-525.591483.1
gold-1966.183534.2
bismuth-2066.243539.4
uranium-2376.75583
einsteinium-2577.7670
iodine-1318.02693
polonium-2068.8760
thulium-1679.25799
gadolinium-1499.28802
actinium-22510.0860
plutonium-24610.84937
radium-22311.43988

106 seconds (megaseconds)

isotope half-life
days 106 seconds
phosphorus-3214.291.235
radium-22514.91.29
bismuth-20515.311.323
vanadium-4815.97351.38011
protactinium-23017.41.50
californium-25317.811.539
thorium-22718.681.614
einsteinium-25320.471.769
uranium-23020.81.80
thorium-23424.102.082
protactinium-23326.9752.3306
curium-240272.3
chromium-5127.70252.39350
mendelevium-26027.82.40
curium-24132.82.83
einsteinium-25539.83.44
plutonium-23745.23.91
mendelevium-25851.54.45
beryllium-753.124.590
californium-25460.55.23
cobalt-5677.276.676
scandium-4683.797.239
sulfur-3587.327.544
thulium-16893.18.04
fermium-257100.58.68
thulium-170128.611.11
polonium-210138.37611.9557
calcium-45162.714.06
curium-242162.814.07
gold-195186.116.08
gadolinium-153240.420.77
zinc-65243.721.06
cobalt-57271.7923.483
einsteinium-254275.723.82
vanadium-4933029
berkelium-24933029
californium-248333.528.81
samarium-14534029
years 106 seconds
ruthenium-1061.02332.3
neptunium-2351.084534.22
cadmium-1091.26740.0
einsteinium-2521.291540.76
thorium-2281.911660.33
thulium-1711.9261
caesium-1342.065265.17
sodium-222.60282.1
californium-2522.64583.5
iron-552.75687.0
plutonium-2362.85890.2
polonium-2082.89891.5
rhodium-1013.3100
cobalt-605.2714166.35
radium-2285.75181
barium-13310.74339
krypton-8510.756339.4
hydrogen-3
(also known as tritium)
12.32389
californium-25013.08413
plutonium-24114.290451.0
niobium-93m16.13509
promethium-14517.711558.9
curium-24418.10571
actinium-22721.772687.1
lead-21022.3700
strontium-9028.79909
curium-24329.1920
caesium-13730.17952

109 seconds (gigaseconds)

isotope half-life
years 109 seconds
bismuth-20732.91.04
titanium-44632.0
uranium-23268.92.17
plutonium-23887.72.77
samarium-15196.63.05
nickel-63100.13.16
polonium-209125.23.95
americium-242m11414.4
silicon-321705.4
argon-392698.5
berkelium-248>300>9.5
californium-24935111.1
silver-108m41813.2
americium-241432.213.64
mercury-19444414.0
niobium-9168021
californium-25190028
holmium-166m11,20038
berkelium-2471,38044
radium-2261,60050
molybdenum-934,000130
holmium-1634,570144
curium-2464,760150
carbon-14[6]5,730181
plutonium-2406,561207.0
thorium-2297,340232
americium-2437,370233
curium-2508,300260
curium-2458,500270
niobium-9420,300640
plutonium-23924,110761

1012 seconds (teraseconds)

isotope half-life
millennia 1012 seconds
protactinium-23132.761.034
lead-20252.51.66
lanthanum-137601.9
thorium-23075.382.379
nickel-59762.4
calcium-411033.3
neptunium-2361544.9
uranium-233159.25.02
rhenium-186m2006.3
technetium-99211.16.66
krypton-812297.2
tin-1262307.3
uranium-234245.57.75
chlorine-363019.5
selenium-7932710.3
curium-24834811.0
bismuth-20836811.6
plutonium-24237511.8
aluminium-2671722.6
106 years 1012 seconds
beryllium-101.3944
zirconium-931.5348
gadolinium-1501.7956
neptunium-2372.14467.7
caesium-1352.373
iron-602.682
technetium-972.682
dysprosium-1543.095
bismuth-210m3.0496
manganese-533.7120
technetium-984.2130
palladium-1076.5210
hafnium-1828.9280
lead-20517.3550
curium-24715.6490
iodine-12915.7500
uranium-23623.42739

1015 seconds (petaseconds)

isotope half-life
106 years 1015 seconds
niobium-9234.7241.0958
plutonium-24481.332.567
samarium-14692.0262.9041
uranium-235703.822.21
109 years 1015 seconds
potassium-401.25139.5
uranium-2384.468141.0
thorium-23214.05443

1018 seconds (exaseconds)

isotope half-life
109 years 1018 seconds
lutetium-17637.641.188
rhenium-18741.221.301
rubidium-8749.721.569
lanthanum-138102.13.22
samarium-147106.13.35
platinum-19048315.2

1021 seconds (zettaseconds)

isotope half-life
1012 years 1021 seconds
osmium-18411.20.35
gadolinium-1521083.4
indium-11544113.9
1015 years 1021 seconds
osmium-1862.00263.2
neodymium-1442.29272.3
samarium-1487.005221.1
cadmium-1137.7240

1024 seconds (yottaseconds)

isotope half-life
1015 years 1024 seconds
hafnium-174702.2
vanadium-501404.4
1018 years 1024 seconds
tungsten-1801.80156.8
europium-1515.004157.9
molybdenum-1007.804246.3
neodymium-1507.905249.5
tellurium-1308.806277.9
zirconium-9620630
bismuth-20920.1630
calcium-4823.01726
cadmium-11631.02979

1027 seconds (ronnaseconds)

isotope half-life
1021 years 1027 seconds
selenium-820.09753.08
barium-1301.238
germanium-761.857
xenon-1362.16568.3
krypton-789.2290
xenon-12418570

1030 seconds (quettaseconds)

isotope half-life
1024 years 1030 seconds
tellurium-1282.269

The half-life of tellurium-128 is over 160 trillion times greater than the age of the universe, which is 4.35×1017 seconds.[7]

See also

Notes

  1. Reaching the limits of nuclear stability, M. Thoennessen, Rep. Prog. Phys. 67 (2004), pp. 1187–1232, §2.3, doi:10.1088/0034-4885/67/7/R04.
  2. "Periodic Table - Ptable".
  3. Niwase, T.; Watanabe, Y. X.; Hirayama, Y.; et al. (2023). "Discovery of New Isotope 241U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions" (PDF). Physical Review Letters. 130 (13): 132502-1 – 132502-6. Bibcode:2023PhRvL.130m2502N. doi:10.1103/PhysRevLett.130.132502. PMID 37067317. S2CID 257976576.
  4. Yirka, Bob (April 5, 2023). "Previously unknown isotope of uranium discovered". Phys.org. Retrieved 2023-04-12.
  5. Radiation, UAB. "Accepted_HalfLives_Commonly_Used_Radioisotopes" (PDF). Accepted_HalfLives_Commonly_Used_Radioisotopes. UAB Radiation Safety. Retrieved 24 October 2024.
  6. 14
    C
    is used in radiocarbon dating.
  7. Walker, John. "Barely Radioactive Elements". fourmilab.ch. Retrieved 2018-03-09.
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