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# What happens to the rate of radioactive decay as the mass of radioactive material decreases?

June 16, 2019 / By Maddox
Question: This was for this lab: http://www.evanschemistrycorner.com/Labs/Nuclear/L12-1a_Simulating_Half_Life.pdf and I completed the whole thing, and now I'm having trouble with the conclusion questions. The whole concept of the lab kinda went right over my head. Can you please help, particularly numbers 3 and 4? I'm not looking for a cop out of homework, this is me genuinely struggling with this concept. Thanks.

## Best Answers: What happens to the rate of radioactive decay as the mass of radioactive material decreases?

Jehosaphat | 6 days ago
"3.Why is each toss in this simulation called a half life?" The probability for a coin showing head up or tail up is p=1/2. In the first trial one expects 50% of 50 pennies= 25 pennies to be decayed. Next, with 25 pennies, 12.5 pennies should have been decayed. In the third run 6.25 pennies are expected to have been decayed.. The key number of this simulation is 2 and because the number of pennies are halved by each run the "time" elapsed is a half life. "4. What is happening to the simulated rate of decay as the number of pennies decreases?" rate= -ΔN/Δt = (N₀-N) /Δt.. Now let Δt be the time of a run= constant. and set it 1 sec for convenience. Run.___.N₀__________.N ____.rate 1_______50__________25_____25 2_______25__________12.5___12.5. and so on. You see the rate is decreasing "5.What happens to the rate of radioactive decay as the mass of radioactive material decreases?" Since mass is proportional to mole ( 1/M) results from question 4 can be taken in to consideration: rate decreases until it becomes zero because no radioactive material is left over. "6.In what way does the data gathered during this investigation simulate the nature of half life?" In a stochastic process.
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We found more questions related to the topic: In over your head homework

Australia and Canada would be glowing masses too. Miller, the only mistakes in C-14 testing are caused by the reservoir effect, (look it up). Deceitful creationists use this as an excuse for discrediting radiometric testing without mentioning the reservoir effect. And the decay of radioactive material like uranium is a basic natural process and unless the physical laws of the universe keep changing the decay rate will remain constant.