What is the total mass of Rn-222 remaining in an original 160-mg sample of Rn-222 after 19.1 days?ġ.

What percentage of a sample of Au-198 would reamin after 1 day, 1 week? Given the Write a half life decay equation that relates the mass of au-198 remaining to time in days. Gold-198 with a half life of 2.6 days is used to diagnose and treat liver disease. the mass number changes *the atomic number changes If an isotope decays by the process of beta emission, _. What is the change in atomic mass number when an atom emits an alpha particle? decreases by 2 *decreases by 4 increases by 2 increases by 4 2. what was the original mass if 0.050g remains after 7.646 days?ġ. The half-life of radon-222 is 3.823 days. How much of a 20-gram sample of this radioisotope remains at the end of each time period? 1) 4 days 2) 8 days How many grams were in the original sample if its half-life is 8.07 days? What is the half life of a radioisotope if you started with 1 gram and 0.250 grams is left after 6 days? im not looking for a free answer,Ī radioisotope has a half-life of 4 days. There are 5g of 131I left after 40.35 days.

Radon-222 undergoes alpha decay.what is the nuclear equation If radon-222 has a half-life of 3.8 days, determine how long it takes for only 1/8 of a sample to remain.

Half life 3 pre alpha