radiation sickness,harmful effect produced on body tissues by exposure to radioactive substances.
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Since its radioactivity presents a serious health hazard (see radiation sickness), disposing of such material is a great problem......nucleus,in physics, the extremely dense central core of an atom.
The Nature of the Nucleus Composition Atomic nuclei are composed of two types of particles, protons and neutrons, which are collectively known as nucleons......electromagnetic radiation,energy radiated in the form of a wave as a result of the motion of electric charges.
A moving charge gives rise to a magnetic field, and if the motion is changing (accelerated), then the magnetic field varies and in turn produces an electric field......
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