Periodic table

Half-life

N = N₀ × (1/2)^(t / t½)

5.7 kybeta_minus → N-14

Common nuclides

Solve for

25 % of the original remains, after 2 half-lives.

Elapsed 11400 y Lost 75

1 t½ · 50.0 %2 t½ · 25.0 %3 t½ · 12.5 %4 t½ · 6.3 %