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Homework Help: Ion or neutral atom?

  1. Oct 26, 2014 #1
    1. The problem statement, all variables and given/known data

    An atom of 28_13 AI decays into stable nuclide 28_14 Si by emitiing a beta particle.
    What's 28_14 Si ?
    the ans given is positive ion?

    in my opinion, it should be a neutral atom... which is correct?
    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Oct 26, 2014 #2

    Doc Al

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    Staff: Mentor

    What's your reasoning? Hint: What's a beta particle?
  4. Oct 26, 2014 #3
    If the 28 _13 nucleus decay then the positive ion is formed? Am I right? But here's an atom not nucleus
  5. Oct 26, 2014 #4


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    Science Advisor
    Homework Helper
    Gold Member

    Think about conservation of charge. If a beta particle is emitted, what does that tell you about what remains?
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