In the nuclear reaction 42 99 43 99 Mo Tc → + m X , what does the symbol X represent?
belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:17.2| Question number:47
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Medicine
A: Mass number must be conserved, hence 99 = s + 99 this means s = 0. Atomic number must be conserved, hence 42 = a + 43 this means a = −1. The particle X with zero mass and charge of negative one is an electron (a beta negative particle).
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