Dec 6, 2025 · Radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei.

Scientists now know that there are three types of radiation—alpha, beta, and gamma. Alpha and beta radiation are different kinds of particles given off by atoms, whereas gamma radiation is energy given …

Dec 6, 2025 · Radioactivity - Natural, Artificial, Decay: Some species of radioactivity occur naturally on Earth. A few species have half-lives comparable to the age of the elements (about 6 × 109 years), so …

Nov 4, 2025 · This article delineates the properties and behaviour of radiation and the matter with which it interacts and describes how energy is transferred from radiation to its surroundings.

Nov 14, 2025 · In 1898 French physicists Pierre and Marie Curie discovered the strongly radioactive elements polonium and radium, which occur naturally in uranium minerals. Marie coined the term …

Dec 6, 2025 · Radioactivity - Medical, Industrial, Research: Radioisotopes have found extensive use in diagnosis and therapy, and this has given rise to a rapidly growing field called nuclear medicine. …

Dec 3, 2025 · radioactivity, property exhibited by certain types of matter of emitting energy and subatomic particles spontaneously. It is, in essence, an attribute of individual atomic nuclei.

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 unstable and …

The study of radioactivity continues to contribute to the understanding of the nature of atoms, and from this, scientists are learning how energy and matter interact to bring about everything that happens in …

Dec 6, 2025 · Radioactivity - Alpha Decay, Particles, Radiation: Alpha decay, the emission of helium ions, exhibits sharp line spectra when spectroscopic measurements of the alpha-particle energies …