Questions tagged 'Radioactive Decay'
5 questions
The half life of a certain radioactive material is 36 days.
The half-life of a certain radioactive material is 36 days. An initial amount of this material has a mass of 487 kg. Please write an exponential function that models the decay of this material. Additi...
What fraction of a Sr-90 sample remains unchanged after 97.3 years
What fraction of a strontium-90 (Sr-90) sample remains unchanged after a period of 97.3 years?
The half-life of bromine-74 is 25 min. How much of a 4.0mg sample is still active after 75 min?
What is the remaining mass of a 4.0 mg sample of bromine-74 after 75 minutes, given that its half-life is 25 minutes? a) 0.50 mg b) 1.0 mg c) 2.0 mg d) 0.25 mg e) 4.0 mg
Nov 17, 2024
Identify the nuclide produced when fluorine-18 decays by positron emission: 18 9F→01e+?
What nuclide is produced when fluorine-18 (¹⁸₉F) decays through positron emission (¹⁸₉F → ¹⁰₈O + ¹₁e⁺)?
What is the mass of an original 5.60-gram sample of iodine-131 that remains unchanged after 40.105 days?
What mass of a 5.60-gram sample of iodine-131 remains after 40.105 days?