2) A radioactive sample reduced to 35% of its initial value in 2 hours. Calculate the half life of the sample
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- A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in Bq of a 1.36-g sample be after 19.8 h?After 2.14 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material? days Need Help? Read ItBarium-133 is a radioactive element used in certain medical procedures. A sample of pure Barium133 has a mass of 18.000 grams. Determine the activity of the sample 47 years after it was created, in units of Curies.
- A radioactive sample has a decay constant of 49.15x10-12 s¹. Estimate the half-life.A radioactive sample is studied for 100 days. It was found that after the given period the radioactive sample reduced to 83 % of the initial amount. From the given data estimate the half-life of the sample.A sample of radioactive material has a half-life of 12 hours. If the initial sample contained 6.2x10¹3 radioactive nuclides estimate the number of radioactive nuclides present in the sample after 5 hours.
- The half-life of radon-222 is about 3.823 days. (a) Determine the decay constant for radon-222. 2.1x10-65-¹ ✓ (b) What percentage of a sample remains undecayed after two weeks (1.21 x 106 s)? %Bq. Determine the half-life (in s) of a radioactive sample that contains 1.50 x 1015 atoms and has an activity of 6.60 x 101If 88 (atomic number) 228 (atomic mass) ?? is produced, determine the parent isotope for each of the following types of decay and justify your answer. a) alpha decay b) beta negative decay c) beta positive decay