Radioactive Decay: 10% Rate for 20 Periods
A radioactive sample of 1000 units decaying at 10% per period retains approximately 121.6 units after 20 periods.
How to use this tool
- Enter initial value, decay rate per period and number of periods in the fields above.
- Results update instantly as you type โ or click Calculate.
- Read your remaining value and the full breakdown beneath it.
Simulate radioactive decay by applying a 10% decay rate per time period over 20 periods.
Frequently asked questions
- What is the difference between decay rate and half-life?
- The decay rate r is the fraction lost each period; the half-life is the number of periods until only half remains. They are linked by tยฝ = log(0.5)/log(1โr).
- Does this assume continuous or discrete decay?
- This calculator uses discrete (period-by-period) decay. For continuous decay use A = Aโยทe^(โฮปt) with the half-life calculator.