Note: The half-life formula shown here is static text for explanation purposes only and is not an interactive calculator.
The half-life of a radioactive substance is the time it takes for half of the radioactive atoms to decay.
The radioactive decay follows the exponential formula:
N(t) = N₀ × (1/2)(t / T½)
Where:
N(t) = number of atoms remaining at time t
N₀ = initial number of atoms
t = elapsed time
T½ = half-life of the substance
Did you know? Radioactivity was discovered in 1896 by French physicist Henri Becquerel, who found that uranium salts emitted rays that could fog photographic plates.
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