A radioactive nucleus undergoes a series of decays according to the sequence

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asked Dec 27, 2018 in Class X Science by priya12 (-11,688 points)

A radioactive nucleus undergoes a series of decays according to the sequence

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If the mass number and atomic number of X3 are 172 and 69 respectively, what is the mass number and atomic number of X?

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2 Answers

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answered Dec 27, 2018 by navnit40 (-3,424 points)

Mass no. of X = 180
Atomic no. of X = 72

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answered Mar 22 by Sravani Basic (24 points)
A-8=172.  A=180
Z-3=69.      Z=72

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