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Homework Help: Is this right?

  1. Dec 30, 2006 #1
    1. The problem statement, all variables and given/known data
    27-Al disintegates to form 29-Al, by what emission this is possible?

    a)alpha b)beta c)positron d)proton
    answer given- beta

    2. Relevant equations
    beta results in atomic no. increase,alpha results in both mass &no. decrease,positron results in decrease in no.,proton results in decrease by 1 in both.

    3. The attempt at a solution
    the answer i think given is wrong as we want a paricle like neutron to make it happen (which is not in the options)

    are answers and options wrong or just my basics are being tested?
  2. jcsd
  3. Jan 11, 2007 #2


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    Staff Emeritus
    Science Advisor
    Gold Member

    This is really late, but for what it's worth, your thinking is correct and the question is wrong (besides, Al-27 is the stable isotope - it does not decay).
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