Schedule of Prenatal Care. Specific schedules of prenatal care vary from provider to provider, but a general schedule follows below, as well as some of the screening tests or activities you might expect at various visits.
radioisotope. a radioactive form of an element, consisting of atoms with unstable nuclei, which undergo radioactive decay to stable forms, emitting characteristic alpha, beta, or gamma radiation. These may occur naturally, as in the cases of radium and uranium, or may be created artificially.
Jupiterimages/Creatas/Getty Images. Radioactive isotopes, also called radioisotopes, are atoms with a different number of neutrons than is usual, making them unstable. A radioisotope's nucleus decays, emitting alpha, beta and gamma rays until the isotope reaches stability.Once itâs stable, the isotope may become another element entirely, such as when uranium decays into lead.ignificance. Radioactive isotopes are useful because they produce alpha, beta and gamma rays. The radiationâs penetrating power depends on its energy, particle mass, and the objectâs density. These properties lead to many practical applications in science, medicine and industry.