Class 12 · Chapter

Nuclei

8 topics · 8 interactive simulations

Stochastic decay of atoms vs theoretical N(t) = N₀e^(−λt) with λ = ln2/T½.

Stacked halving boxes — 4 isotopes (C-14, I-131, U-238, P-32).

Side-by-side linear N(t) + semilog lnN(t) — slope = −λ on the log plot.

Weizsäcker semi-empirical mass formula — peak at ⁵⁶Fe, labeled key nuclei.

Q = Δm · c² — preset D-T, D-D, p-Li fusion and U-235 fission reactions.

Animated chain reaction — tune k to toggle subcritical / critical / supercritical.

D-T fusion overcoming Coulomb barrier — plasma T sets kinetic energy.

E = mc² — mass in amu → J, MeV, kWh, megatons TNT. Presets for electron → ²³⁵U.