Capable of luminescence under the action of cathode rays, X rays, or any of the allied forms of radiation.
of, exhibiting, or caused by radioactivity.
Property of undergoing spontaneous nuclear transformation in which nuclear particles or electromagnetic energy are emitted.
activity consisting of the disintegration of atomic nuclei.
Material that is unstable, breaking down to form another material and also radiation. Tritium is an example.
Something is radioactive when it gives off particles or rays from an atom's nucleus.
Material that gives out harmful radiation.
A substance that emits high energy rays or particles.
Emits high energy radiation such as alpha, beta or gamma radiation
Having the property of spontaneously changing into another isotope or element.
Something sending out radiation.
a radionuclide that undergoes spontaneous nuclear decay
1) Term given to describe substances that contain atoms whose nuclei are are unstable, which causes the substance to slowly decay and emit radiation. Radioactive minerals usually take an extremely long time to decay if kept in proper settings. 2) (verb) - Emitting alpha, beta, and gamma rays.
Certain elements (radium, uranium, thorium, and their products), emit radiant energy by spontaneously emitting alpha, beta, or gamma particles. See; Radioactivity, Alpha Particle, Beta Particle, Gamma Ray.
A word used to describe substances that contain atoms that emit nuclear radiation. How radioactive a substance is depends on its activity.
Emitting radiation, as in the case of many forms of uranium. Radioactivity is caused by changes occurring in the nucleus of the atom.
A substance is said to be radioactive if the atomic nuclei it contains exhibit spontaneous disintegration or decay by emission of particles, and/or electromagnetic radiation.
exhibiting or caused by radioactivity; "radioactive isotope"; "radioactive decay"; "radioactive fallout"
an unstable nuclei which will decay to a different nuclei and emit radioactivity (an alpha, beta, or gamma) in the process.
Substance containing an element which decays.
Having the property of releasing radiation.
It is a term given to describe substances containing stoms with unstable nuclei. It causes the substance to decay slowly and emit radiation. If kept in proper settings, radioactive minerals take an extremely long time to decay.
Substance capable of giving off radiant energy in the form of particles or rays by the spontaneous disintegration of atomic nuclei. Can damage and destroy cells and chromosomal material
Giving off radiation.
The spontaneous decay or disintegration of an unstable atomic nucleus, usually accompanied by the emission of ionizing radiation, such as alpha () or beta (ß) particles or gamma (?) rays.
a characteristic in which an element or compound gives off radiant energy in the form of alpha, beta, or gamma rays (radioactivity) through the decomposition or destruction of individual atoms
Something which gives off high energy rays or particles.
Material that spontaneously emits ionizing electromagnetic energy in the form of rays (gamma rays & X rays), or sub-atomic particles (beta particles, alphaparticles, neutrons, protons etc.) (Ionizing radiation is energy of a high enough level to remove electrons from an atom creating free radicals, a process which is especially dangerous for living things).
Capable of emitting radiant energy.
Giving off high-dose energy in the form of particles. Radioactive substances can be used in the treatment of some blood disorders.
Having unstable atoms that decay or break down to another kind of atom. The process emits high-energy particles. For example, radium decays to form radon. Radiation includes high-energy particles, which include alpha and beta particles and gamma rays.
The property of an isotope or element which is characterised by giving off radiant energy in particles or rays by the disintegration of atomic nuclei
A substance that is capable apable of emitting high-energy rays or particles as radiation.
Substances that have their own energy because of their unstable nuclei.
Emitting energy waves due to decaying atomic nuclei. Radioactive substances are used in medicine as tracers for diagnosis, and in treatment to kill cancerous cells. See the entire definition of Radioactive
containing unstable atoms. In order to regain their stability, these atoms give off, or emit, one or more of three kinds of radiation: alpha, beta or gamma rays. Depending on the intensity and duration of exposure, these radioactive rays can pose health risks either by causing tissue damage or by increasing the risk of cancer. Therefore, highly radioactive materials such as spent fuel cores are difficult to handle without risking one's health or even one's life.
A substance that gives off radiant energy in the form of particles or rays.
Emitting energy in the form of waves or particles.
A substance that emits radiation is said to be radioactive. Radioactivity
Radioactive describes the spontaneous disintegration of atomic nuclei accompanied by the emission of small particles. Depending on the type of emission, scientists define alpha (helium nuclei), beta (electrons or positrons), and gamma radiation (short-wavelength electromagnetic waves).
Something that gives off high energy rays or particles.
The property of the nuclei of certain atoms spontaneously emitting particles or gamma radiation or of emitting x radiation following orbital electron capture or of undergoing spontaneous fission. Atomic nuclei are of two types, stable and unstable. Unstable nuclei are said to be radioactive and eventually are transformed by radioactive decay into the stable nuclei. One or more of the three types of radioactive emissions ( or particles or -rays) occur during each stage of the decay.
Relating to or making use of radioactive substances or the radiation they emit.
Form of an element that is unstable and gives off radiation when it breaks down (radioactive decay). Radioactive dating uses rates of radioactive decay to determine the age of objects (p.208-211).
An unstable isotope that decays spontaneously and releases subatomic particles or units of energy.
Emitting radiation that results from atomic disintegration. The electromagnetic energy of, for example, X-rays and gamma rays is radioactive.
is something that gives off rays that go through solid objects.
Capable of spontaneously emitting ionizing radiation.
A radioactive isotope gives off (or is capable of giving off) radiant energy in the form of particles or rays by the spontaneous disintegration of the nucleus. Classifying materials