Radioactive decay (A-level only)

Use of activity, $A = \lambda N$

Modelling with constant decay probability.

Questions may be set which require students to use $A = A_0\mathrm{e}^{-\lambda t}$

Questions may also involve use of molar mass or the Avogadro constant.

Half-life equation: $T_{\frac{1}{2}} = \frac{\ln 2}{\lambda}$

Determination of half-life from graphical decay data including decay curves and log graphs.

Applications eg relevance to storage of radioactive waste, radioactive dating etc.