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(7) The diagram below shows a chart of nuclides (isotopes of elements) in the radioactive decay series of U-238 to Pb-206 There are 14 nuclear reactions in this series. Write and balance each one: 128 130 132 134 136 138 140 142 144 146 124 126 Ura 34 92 ? emitter ? 230 234 90 emitter a stable nucleus 226 86 210 214 218 84 210 Number of neutrons

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