Ruthenium-106 (106 Ru) is used to treat melanoma in the eye. This isotope decays by ẞ emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and how many neutrons does the 106 Ru nucleus contain? protons: 44 Identify the missing daughter nucleus in the ẞ emission decay of 106 Ru. neutrons: 62 +e+ve 106 Rh 106 Ru How many years after 106 Ru is implanted in the eye does it take for its decay rate (or activity) to be reduced to 27.5% of the initial decay rate? Use 1 year = 365 days. time: years

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