www.radprocalculator.com/Decay.aspx

Radioactive Decay Useful for calculating today's activity for any radioactive isotope. You may also back decay sources to find out the original activity (or for any date), knowing the current activity. If the isotope that you wish to decay is not on the drop down list, check the 'not listed' check-box and manually enter the isotope name and its ...

www.easycalculation.com/chemistry/radioactive-decay.php

Radioactive Isotopes Decay Calculator. Online calculator that allows you to find out the radiation activity decay in most popular isotopes used in chemistry and medicine. Note: The calculation of radioactivity in minerals is based on certain assumptions.

calistry.org/calculate/decayTime

The time taken for a radioactive element to decay depends on its initial and final mass and the half-life of that radioactive element. Half -life is a characteristic of each radioactive isotope and it ranges from a few fractions of a second to several million or billion years.

www.gigacalculator.com/calculators/half-life-calculator.php

Half-Life, Decay Constant, and Mean Lifetime. Radioactive decay is an exponential process, meaning that the quantity of matter decreases at a rate proportional to its current value. The most intuitive mathematical description of the rate of decay is half-life, which our half-life calculator can calculate. This is the equation for the relation ...

www.calculators.tech/half-life-calculator

A radioactive isotope will remain 15.625 grams after 30 years if its half-life is 6 years, and initial values are 500 grams. Similarly, the elapsed time t and the initial quantity N (0) of a radioactive isotope can also be calculated by following the same process. How to use our half life calculator?

ehs.missouri.edu/ehs/rad/isotopecalculator

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www.radprocalculator.com/TimedDecay.aspx

Nuclear medicine and medical physics people may use the calculator to ascertain when a diagnostic or treatment isotope has lost its effective strength. A feature that sets this calculator apart from the other online timed decay calculators is its ability to give you the actual calendar date that the isotope will reach the desired activity.

www.easycalculation.com/chemistry/Ra-226.html

Radium (Ra) 226 Radioactive Isotope Decay Calculator. Online radioactive decay calculator that allows you to find out the radioactivity decay in Radium (Ra) 226. Note: The calculation of radioactivity in minerals is based on certain assumptions.

www.calculator.net/half-life-calculator

This free half-life calculator can determine any of the values in the half-life formula given three of the four values. The calculator can also convert between half-life, mean lifetime, and decay constant given any one of the three values. Learn more about how the half-life formula is used, or explore hundreds of other math, finance, fitness, and health calculators.

www.omnicalculator.com/chemistry/half-life

Half life is defined as the time required for half of the unstable nuclei to undergo their decay process. Each substance has a different half life. For example, carbon-10 has a half life of only 19 seconds, making it impossible for this isotope to be encountered in nature. Uranium-233, on the other hand, has the half life of about 160 000 years.