Learning Goal: Radioactive decay - Half - life Time N 0 1,000,000 1000 500,000 250,000 125,000 750 62,500 31.250 15,625

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Learning Goal Radioactive Decay Half Life Time N 0 1 000 000 1000 500 000 250 000 125 000 750 62 500 31 250 15 625 1 (97.2 KiB) Viewed 47 times

Learning Goal: Radioactive decay - Half - life Time N 0 1,000,000 1000 500,000 250,000 125,000 750 62,500 31.250 15,625 500 7,813 3,906 1,953 250 977 125 Number of nuclides, N X 109 tie 2112 310 4142 5042 6122 7112 82 9142 10012 0 tve 21,2 31,241,251,26tiq 71,2 81,2 912101,2 Time in multiples of 1,2 A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour = 60 min, 1 min = 60 s =

Part C - The initial sample is 3.1 kg . What is the mass of the radioactive material that remains after 3.50 years ? Keep 3 digits after the decimal point. ΟΙ ΑΣΦ 圖? kg mass remains = Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part D - in Part C, What is the mass of the radioactive material that has decayed in 3.50 years? Keep 3 digits after the decimal point. IVO AO ? kg mass decayed = Submit Request Answer Part E - New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the initial activity in decays/s (Bq)? Keep 2 digits after the decimal point. ΟΙ ΑΣφ ? Вq Ro = Submit Request Answer

Part F - New case: The initial sample has No = 6.4x1010 radioactive nuclei. What is the number of radioactive nuclei that remain after 3.50 years ? Use scientific notations, format 1.234*10". ΑΣΦ ? N = Submit Request Answer Part G - New case: After 3.50 years what is the activity in decays/s (Bq)? Keep 2 digits after the decimal point. ΕΠΙ ΑΣΦ ? Bq R= Submit Request Answer