Rates and Nuclear Chemistry

The human body is a meticulously timed theater of chemical transformations. Some events, like the flash of a pain receptor or the neutralization of stomach acid by a chewable antacid, occur in fractions of a second. Others, such as the metabolism of an intravenously administered drug or the decay of a radiographic tracer injected for a scan, unfold predictably over hours or days. To practice medicine is to intervene in this timeline. By understanding chemical kinetics—the mechanics governing how and why reactions happen at a specific speed—and nuclear chemistry—the spontaneous physical alterations of the atoms themselves—healthcare professionals can predictably control the pace of healing, safely dose radioactive diagnostics, and fundamentally understand how the physical universe governs biology at the subatomic and atomic levels.