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Look at the periodic table of chemical elements in Appendix B. The most stable nucleus of...

Look at the periodic table of chemical elements in Appendix B. The most stable nucleus of gold (symbol: Au) has an atomic number of 79 and an atomic mass of 197 (197-79 Au).

a. What isotope of what element can make this gold nucleus with an alpha decay?
b. What isotope of what element can make this gold nucleus with an electron-emitting beta decay? c. What isotope of what element can make this gold nucleus with a positron-emitting beta decay?

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