What nuclide will be formed when ^{214}_{82}Pb successively emits two beta particles, then one alpha particle from its nucleus? Write successive equations showing these changes.
Question 18.4: What nuclide will be formed when ^214 82Pb successively emit...
The changes brought about in the three steps outlined are as follows:
β loss: Increase of 1 in the atomic number; no change in mass
β loss: Increase of 1 in the atomic number; no change in mass
α loss: Decrease of 2 in the atomic number; decrease of 4 in the mass
The equations are
where X stands for the new nuclide formed. Looking up each of these elements by their atomic numbers, we rewrite the equations
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