Ask Question
23 July, 16:31

If 20. g of a radioactive isotope are present at 1:00 pm and 5.0g remain at 2:00 pm, what is the half life of the isotope?

+4
Answers (1)
  1. 23 July, 16:50
    0
    The half life of the isotope is calculated as follows

    the time difference = 2.00 - 1.00 = 1 hour (60min)

    if 20 g decay in 1 hour (60min) and 5 grams remains then the mass that decay = 20-5 = 15 grams

    the half life is time required for a quantity to reduce to half its initial value

    and if the initial concentration = 20g then the half = 20/2 = 10g

    then time = 10g x 60min/15g = 40 min
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “If 20. g of a radioactive isotope are present at 1:00 pm and 5.0g remain at 2:00 pm, what is the half life of the isotope? ...” in 📘 Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers