☢️ Radioactive Decay Lab

Model exponential nuclear decay, remaining isotope fractions, and radiometric carbon dating via the fundamental decay law $N(t) = N_0 (1/2)^{t / t_{1/2}}$.

Radioisotope Preset

Half-Life ($t_{1/2}$ in years)

Initial Quantity ($N_0$) grams or %

Elapsed Time ($t$ in years)

Remaining ($N(t)$)

25.00

25.0% of initial

Decayed Amount

75.00

75.0% transformed

Half-Lives Elapsed

2.00 $t_{1/2}$

Decay Constant ($\lambda$)

1.21 × 10⁻⁴ yr⁻¹