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OpenStudy (daniellelovee):
Which of the following radioisotopes is naturally occurring? 93^239Np 53^131I 102^254No 96^242Cm
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OpenStudy (daniellelovee):
@abb0t
OpenStudy (abb0t):
probably the one closest to it's atomic number.
OpenStudy (daniellelovee):
is it C?
OpenStudy (daniellelovee):
@Australopithecus
OpenStudy (australopithecus):
First off Everything up to Cf (Californium) atomic number 98 is known to exist in nature, everything after that is assumed to be synthetically produced. Iodine is pretty far from its natural atomic mass you could thus assume it is likely to be unstable. The rest that are left over you can use an island of stability diagram: http://upload.wikimedia.org/wikipedia/commons/b/bc/Island_of_Stability.svg or go by abb0ts suggestion.
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OpenStudy (australopithecus):
by assumed I mean conjectured
OpenStudy (daniellelovee):
thank you
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