Radioactive elements half-life and type of radiation

Symbol

Serial number

The mass number of the isotope

Half life

Radiation

Ас

89

227

22 years

α, β

Ат

95

243

7,8·103 years

α

At

85

210

8,3 hours

Эл. захв.

Вк

97

247

104 years

α

Cf

98

249

360 years

α

Cm

96

247

4·107 years

α

Es

99

254

480 days

α

Fm

100

253

3 days

Эл. захв., α

Fr

87

223

22 minutes

α, β

Lr

103

257

8 seconds

α

Md

101

256

1,5 hours

Эл. захв.

Np

93

237

2,1·10years

α

No

102

256

8 seconds

α

Pa

91

231

3,2·10years

α

Pm

61

147

2,5 years

β

Po

84

210

138,4 days

α

Pu

94

242

3,3·10years

α

Ra

88

226

1622 years

α

Rn

86

222

3,83 days

α

Tc

43

99

2,1·10years

β

Th

90

232

1,4·1010 years

α

U

92

238

4,5·10years

α


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