Nuclear decay (exponential)
N = N₀ e^(−λt) with λ from half-life.
Calculator
How to use
Decay
Same time units for T½ and t.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
N = N₀ e^(−λt) with λ from half-life.
Same time units for T½ and t.
Educational use only. Check signs, units, and modeling assumptions (e.g. flat Earth g, no air resistance unless stated).
Model / formula
N = N₀ e^(−λt), λ = ln 2 / T½
Result
λ = 1.2097e-4 s⁻¹ N(t) = 8.8606e+22 N/N₀ = 0.8861