Calculateur de Section Efficace — Formule
## Remaining After n Half-Lives
Each half-life reduces the remaining amount by half. After n half-lives, the fraction remaining is (1/2)^n.
### Formula
**N = N0 × (1/2)^n**
This applies to radioactive decay, drug elimination, chemical degradation, and any first-order process.
Each half-life reduces the remaining amount by half. After n half-lives, the fraction remaining is (1/2)^n.
### Formula
**N = N0 × (1/2)^n**
This applies to radioactive decay, drug elimination, chemical degradation, and any first-order process.
Exemple Résolu
Starting with 100 grams, after 5 half-lives.
- Remaining = 100 × (0.5)^5
- Remaining = 100 × 0.03125 = 3.125 grams
- Only 3.125% remains after 5 half-lives