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Radiation WorksheetPart 11.The graph above represents the nuclear decay of a radioactive element, measured using a radiation-detecting device. What is the half-life, in days, of this hypothetical element?The half-life is 2 days. 2.If the half-life of a given substance is 65 days, how long will it take for a 100-gram sample of the substance to decay until there is only 25 grams of the radioactive material remaining?If the half-life of a given substance is 65 days, the 100-gram sample substance will take 130 days to decay until there is only 25 grams remaining. 3.If a sample of radioactive isotopes takes 60 minutes to decay from 200 grams to 50 grams, what is the half-life of the isotope? Hint: First, determine how many times the sample has lost half of its mass, which tells you how many half-life cycles have occurred.The half-life of the isotope is 30 minutes. 4.If a 500.0 g sample of technetium-99 decays to 62.5 g of technetium-99 remaining in 639,000 years, what is the half-life of technetium-99?The half life of technetium-99 would be 213,000 years.