Half-Life and Radioactive Decay

In this video Paul Andersen explains how a radioactive nuclei can decay by releasing an alpha, beta, or gamma particle. The exact moment of decay for each nuclei can not be determined but probability is useful in predicting the half-life. The half-life is the amount of time required for half of the radioactive nuclei to decays and depends on the decay constant. Several examples of decay and several half-lives are included.