is there any easy, simple definitions??
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The nucleus of an atom of a radioactive element is unstable. To become more stable, radioactive nuclei emit alpha particles, beta particles, and gamma radiation.
Radioactivity is the name of this process.
Radioactivity is the name of this process.
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Simply radioactivity is the unusual activity of radioactive elements.
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in nature, it should not be surprising that there are many nuclear isotopes which are unstable and emit some kind of radiation. The most common types of radiation are called alpha, beta, and gamma radiation, but there are several other varieties of radioactive decay.
Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in nature, it should not be surprising that there are many nuclear isotopes which are unstable and emit some kind of radiation. The most common types of radiation are called alpha, beta, and gamma radiation, but there are several other varieties of radioactive decay.