A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are …

A radioactive isotope, also known as a radioisotope, radionuclide, or radioactive nuclide, is any of several species of the same chemical element with different masses whose nuclei are …

Nov 11, 2025 · The rate at which a radioactive element decays is expressed in terms of its half-life; i.e., the time required for one-half of any given quantity of the isotope to decay.

Radioactive isotopes, or radioisotopes, are species of chemical elements that are produced through the natural decay of atoms.

The rate at which a radioactive element decays is expressed in terms of its half-life; i.e., the time required for one-half of any given quantity of the isotope to decay.

Carbon-14, the longest-lived radioactive isotope of carbon, whose decay allows the accurate dating of archaeological artifacts from 500 to 50,000 years old. Carbon-14 has a half-life of …

The movement of a chemical element under study may be traced by adding a radioactive isotope (or radioisotope) of the same element. The radiations emitted by such a radioisotope can be …

Nov 11, 2025 · The rate at which a radioactive element decays is expressed in terms of its half-life; i.e., the time required for one-half of any given quantity of the isotope to decay.

Nov 4, 2025 · One example of this kind of radiation is the electron, first established as a negatively charged particle in 1897 by the English physicist Joseph John Thomson and later …

Radioactive isotope, any of the species of the same chemical element that have different masses and unstable nuclei that emit radiation.