which of these nuclides is most likely to be radioactive?



a)    oxygen-16
b)   21383Bi
c)    20981Tl
d)   10343Mo
e)    24998Cf
f)     24997Bk
g)    plutonium-239.
h)    potassium-41
i)       polonium-209
j)       hydrogen -3
k)    helium -3

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