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The Nuclear Decay Calculator will calculate the:

- number of undecayed atomic nuclei as a function of time in a sample when the initial number and half-life are known

The Number of undecayed particles in the sample as a function of time elapsed N(t) is |

Number of undecayed particles in the sample as a function of time elapsed calculation |
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N(t) = N_{0} ∙ e^{- ln 2/T1/2 ∙ t}N(t) = ∙ e^{- ln 2/ ∙ }N(t) = ∙ e^{- ∙ }N(t) = ∙ e^{}N(t) = ∙ N(t) = |

Nuclear Decay Calculator Input Values |

Initial number of atomic nuclei (N_{0}) |

Half-life of radioactive element (T_{1/2}) s [second] |

Time elapsed since the beginning of process (t) s [second] |

Please note that the formula for each calculation along with detailed calculations are available below. As you enter the specific factors of each nuclear decay calculation, the Nuclear Decay Calculator will automatically calculate the results and update the Physics formula elements with each element of the nuclear decay calculation. You can then email or print this nuclear decay calculation as required for later use.

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N(t) = N_{0} ∙ e^{- ln 2/T1/2 ∙ t}

This formula derived from

N(t) = N_{0} e^{-λ ∙ t}

where

λ = *ln 2**/**T*_{1/2}

The following Physics tutorials are provided within the Nucleus Physics section of our Free Physics Tutorials. Each Nucleus Physics tutorial includes detailed Nucleus Physics formula and example of how to calculate and resolve specific Nucleus Physics questions and problems. At the end of each Nucleus Physics tutorial you will find Nucleus Physics revision questions with a hidden answer that reveals when clicked. This allows you to learn about Nucleus Physics and test your knowledge of Physics by answering the test questions on Nucleus Physics.

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