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www.radprocalculator.com/Decay.aspx

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 half-life to perform the calculation.

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.

www.hse2.ubc.ca/rad/Calc/calcframe.htm

Radioactive Decay Calculator ... Decay time (t) UBC Disposal Limits * Solid (kBq/kg) ** Liquid (kBq/l) *** Gaseous (kBq/m) * - Only the first 9 isotope have UBC disposal limits. Refer to your licence or contact your radiation safety office for the disposal limits of other isotopes.

www.graphpad.com/quickcalcs/radcalcform.cfm

Radioactivity calculator Radioactively labeled compounds are commonly used in biological and chemical research. Use these calculators to perform the radioactivity calculations commonly used in setting up and analyzing biochemical and pharmacological experiments.

hps.org/hpspublications/decay.cfm

Decay Calculator. This Web application will allow you to calculate the activity of a radionuclide after a specified interval of time. The list of radionuclides excludes those with half lives measured in seconds.

www.miniwebtool.com/exponential-decay-calculator

The online Exponential Decay Calculator is used to solve exponential decay problems. It will calculate any one of the values from the other three in the exponential decay model equation. Exponential Decay Formula. The following is the exponential decay formula: P(t) = P 0 e-rt.

www.myeducorner.com/radioactive-decay-calculator.html

Radioactive Decay: Definition, Formula & Types What is Radioactivity & Radioactive Decay? Radioactivity is the phenomenon due to nuclear instability which is exhibited by the nuclei of an atom. It is a process by which the nucleus of an unstable atom loses energy and emits radiations. Henry Becquerel first discovered radioactivity.

www.omnicalculator.com/chemistry/half-life

The half life calculator is a tool that helps you understand the principles of radioactive decay. You can use it not only to learn how to calculate half life, but also the initial and final quantity of a substance or its decay constant. This article will also present you with the half life definition and the most common half life formula.

www.perkinelmer.com/tools/calculatorrad

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www.reference.com/science/calculate-radioactive-decay-6fa004cbeb64e777

An element's radioactive decay can be determined through a single equation which requires imputing the isotope's half life, its rate of decay and the decay time since the rate of decay is measured. Every isotope has its own half-life. The half-life is the amount of time it takes for a given quantity of the isotope to lose half of its radioactivity.