Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays

Question

Ruthenium-106 (106Ru) is used to treat melanoma in the eye. This isotope decays by ?? emission with a half-life of 373.59 days. One source of the isotope is reprocessed nuclear reactor fuel. How many protons and neutrons does the 106Ru nucleus contain?

Identify the missing daughter nucleus in the ?? emission decay of 106Ru below.

How many years after 106Ru is implanted in the eye does it take for its decay rate (or activity) to be reduced to 26.5% of the initial decay rate? Use 1 year = 365 days.

Explanation / Answer

How many protons and neutrons does the 106Ru nucleus contain?

Solution: Since its an isotope so here number of protons must be Z = 44

Now Number of neutron N = A - Z = 106 - 44 = 62

Identify the missing daughter nucleus in the ?

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