The radioactive element. Another element in the table element that is different from a property that has never been studied. It is possible to irradiate the atom of the new element is a laeoklai. These changes occurred? In 1896 (2439 (1896)) on ngotwon Henri back gate aren. Scientists nationals of France It was found that when the sheet of paper wrapped photographic film that is black with a compound of uranium. The film looks like it was light, and when the experiment with other types of uranium compounds, it is therefore concluded that the same result would have the rays radiating out from the element uranium. The following year, and Marie Curie discover radium and thorium, polonium, whether that be the same radiation as second that radiation itself continuously, this is called the kammantaphap radiation is changing within the nucleus of an unstable isotope and element that has this property if the radioactive element. Most of the radioactive chemical element with the atomic number higher than 83 but some radioactive elements with atomic number less than 83 {} ^ {43} of natural radioactive elements found in the Pt of various kinds, such as {} ^ {238} U {} ^ {241} ^ {232} U {} and {} ^ Th {222} U-238 U-235 Th-232 Rn, or they may burn and Rn-222. In addition, the synthesis of radioactive elements scientists to use in various aspects of it.
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