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Half-life of Radioactive Substances

Original and resultung amount have the same value (e.g. Kilogramms, Milligramms, %, etc.), as well as half-life and time passed (one unit, e.g. s, min, h, d, a, etc). Please insert three values, the fourth will be calculated. You can choose which value you want to leave blank.

Original amount:
Time passed:
Resulting amount:

See also Decay: Convert Half-Life and Mean Lifetime


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