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Half-Lives for Several Radioactive Isotopes
Isotope Half-Life y = years, d = days, h = hours, m = minutes, s = seconds Type of Emission E.C. = electron capture, S.F. = Spontaneous fission Isotope Half-Life y = years, d = days, h = hours, m = minutes, s = seconds Type of Emission E.C. = electron capture, S.F. = Spontaneous fission
6 14 C 5730 y ( β ) 83 210 Bi 5.01 d ( β )
7 13 N 9.97 m ( β + ) 83 212 Bi 60.55 m ( α or β )
9 15 F 4.1 × 10 −22 s ( p ) 84 210 Po 138.4 d ( α )
11 24 Na 15.00 h ( β ) 84 212 Po 3 × 10 −7 s ( α )
15 32 P 14.29 d ( β ) 84 216 Po 0.15 s ( α )
19 40 K 1.27 × 10 9 y ( β or E . C . ) 84 218 Po 3.05 m ( α )
26 49 Fe 0.08 s ( β + ) 85 215 At 1.0 × 10 −4 s ( α )
26 60 Fe 2.6 × 10 6 y ( β ) 85 218 At 1.6 s ( α )
27 60 Co 5.27 y ( β ) 86 220 Rn 55.6 s ( α )
37 87 Rb 4.7 × 10 10 y ( β ) 86 222 Rn 3.82 d ( α )
38 90 Sr 29 y ( β ) 88 224 Ra 3.66 d ( α )
49 115 In 5.1 × 10 15 y ( β ) 88 226 Ra 1600 y ( α )
53 131 I 8.040 d ( β ) 88 228 Ra 5.75 y ( β )
58 142 Ce 5 × 10 15 y ( α ) 89 228 Ac 6.13 h ( β )
81 208 Tl 3.07 m ( β ) 90 228 Th 1.913 y ( α )
82 210 Pb 22.3 y ( β ) 90 232 Th 1.4 × 10 10 y ( α )
82 212 Pb 10.6 h ( β ) 90 233 Th 22 m ( β )
82 214 Pb 26.8 m ( β ) 90 234 Th 24.10 d ( β )
83 206 Bi 6.243 d ( E . C . ) 91 233 Pa 27 d ( β )
92 233 U 1.59 × 10 5 y ( α ) 96 242 Cm 162.8 d ( α )
92 234 U 2.45 × 10 5 y ( α ) 97 243 Bk 4.5 h ( α or E . C . )
92 235 U 7.03 × 10 8 y ( α ) 99 253 Es 20.47 d ( α )
92 238 U 4.47 × 10 9 y ( α ) 100 254 Fm 3.24 h ( α or S . F . )
92 239 U 23.54 m ( β ) 100 255 Fm 20.1 h ( α )
93 239 Np 2.3 d ( β ) 101 256 Md 76 m ( α or E . C . )
94 239 Pu 2.407 × 10 4 y ( α ) 102 254 No 55 s ( α )
94 239 Pu 6.54 × 10 3 y ( α ) 103 257 Lr 0.65 s ( α )
94 241 Pu 14.4 y ( α or β ) 105 260 Ha 1.5 s ( α or S . F . )
95 241 Am 432.2 y ( α ) 106 263 Sg 0.8 s ( α or S . F . )

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Source:  OpenStax, Chemistry. OpenStax CNX. May 20, 2015 Download for free at http://legacy.cnx.org/content/col11760/1.9
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