a radioactive sample has a half life of 10s if 20,000 nuclei are present at t=10s how many nuclei will be there at t = 40 s
a radioactive sample has a half life of 10s if 20,000 nuclei are present at t=10s...
A radioactive sample contains two different types of radioactive nuclei: A, with half-life 9.0 days, and B, with half-life 18.0 days. Initially, the decay rate of the A-type nucleus is 256 times that of the B-type nucleus. 1) When will their decay rates be equal?
50% of the nuclei in a radioactive sample decay in one half life. What percent decay in four half lives?
What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
Two radioactive nuclei A and B are present in equal numbers to begin with. Three days later, there are 4.28 times as many A nuclei as there are B nuclei. The half-life of species B is 2.08 days. Find the half-life of species A (in days).
Two radioactive nuclei A and B are present in equal numbers to begin with. Three days later, there are 3.35 times as many A nuclei as there are B nuclei. The half-life of species B is 1.93 days. Find the half-life of species A (in days).
(1 point) Radon is a radioactive gas with a half-life of 3.82 d. If there are initially 460 decays/s in a sample, how many radon nuclei are left after 3 d 7
Carbon 14, (14^, 6 C ) is a radioactive isotope of carbon that has a half-life of 5,730 years. If an initial sample contained 1,000 14C nuclei, how many would still be around after 22,920 years?
91. If the half – life of a sample of radioactive material is 60 days, what fraction of the original radioactive nuclei will remain after 120 days.
A sample contains 7.10×104 radioactive nuclei. In a time of 3 minutes, 3.50×103 of the nuclei decay. Evaluate the half life of the sample (in minutes).
In 9,748 seconds, the number of radioactive nuclei decreases to 1/16 of the number present initially. What is the half-life (in s) of the material? Enter an integer.