Kammantaphap radiation (radioactivity) is a term that is used to invoke a different (disintegration) of atoms. The properties of the atoms represented by the number of protons in the nucleus that in nature, certain types of unstable nucleus, there is a crack or decay (decay) This phenomenon is called kammantaphap and is called nucleus of atoms with radiation kammantaphap that radioactive nuclide (nuclei), degradation of kammantaphap radiation. Represented by the unit, known as one of Beck's Beck's khoe khoe (becquerels) of mackerel, mackerel. Radioactive nuclide (radionuclide) is decomposed with a specific rate constants without adverse effects caused by external factors such as temperature or pressure from time to time that radioactive nuclide decay half-reduced. Also known as (Half-life) which is different in each type of radioactive elements that have a value in seconds, from the fraction to a billion years. For example, iodine-131 (I-131) There is a half life 8 days as uranium-238 (U-238), which is currently. The half life is 4.5 billion years, potassium-40 (K-40), which is the main source of radiation kammantaphap in the body; There are half a billion years of 1.42 life.
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