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6 Radioactivity

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Question 85
H

A nucleus undergoes two alpha decays and one beta-minus decay. The final nucleus contains 82 protons and 125 neutrons. Which pair describes the original nucleus?

[1]
A

mass number 215215215; atomic number 878787

B

mass number 199199199; atomic number 797979

C

mass number 215215215; atomic number 858585

D

mass number 211211211; atomic number 838383

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6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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