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Question
A radioactive nucleus (initial mass number A and atomic number Z) emits 2α and 2 positrons. The ratio of a number of neutrons to that of protons in the final nucleus will be ______.
Options
`("A" - "Z" - 4)/("Z" - 2)`
`("A" - "Z" - 2)/("Z" - 6)`
`("A" - "Z" - 4)/("Z" - 6)`
`("A" - "Z" - 12)/("Z" - 4)`
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Solution
A radioactive nucleus (initial mass number A and atomic number Z) emits 2α and 2 positrons. The ratio of the number of neutrons to that of proton in the final nucleus will be `underline(("A" - "Z" - 2)/("Z" - 6))`.
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