An element X decays first by positron emission and then two alpha - pa – InterviewSolution

1.	An element X decays first by positron emission and then two alpha - particles are emitted in successive radioactive decay. If the product nucleus has a mass number 229 and atomic number 89, the mass number and the atomic number of element X are
Answer» 273, 92 237, 94 238, 93 273, 93 Answer :B

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