Radioactive meaning

rā'dē-ō-ăk'tĭv
The definition of radioactive is something that gives off energy waves called radiation.
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Thorium.
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Uranium (238)
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Potassium.
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Uranium (235)
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Iodine.
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Technetium.
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Uranium.
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Plutonium.
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Carbon.
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Radium.
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Radon.
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Polonium.
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Calcium.
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Argon.
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Chlorine.
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Carbon.
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Cesium.
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Strontium.
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Tritium.
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Cobalt (60)
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Iron (55)
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Sodium (22)
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Manganese.
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Cobalt (57)
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Zinc.
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Calcium.
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Tin.
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Sulfur.
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Iodine (125)
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Iron (59)
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Chromium.
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Phosphorus.
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Iodine (131)
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Gold.
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Bromine.
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Sodium (24)
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Copper.
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Potassium.
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Nitrogen.
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Oxygen.
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Plutonium (238)
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Neptunium.
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Cesium.
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Ruthenium.
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Strontium.
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Iodine.
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Xenon.
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Tellurium.

An example of radioactive is the element Plutonium which is used for nuclear bombs.

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Of, exhibiting, or caused by radioactivity.
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Extremely sensitive or controversial.
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Giving off, or capable of giving off, radiant energy in the form of particles or rays, as alpha, beta, and gamma rays, by the spontaneous disintegration of atomic nuclei.
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Relating to, exhibiting, or caused by radioactivity.
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Exhibiting radioactivity.
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Rubidium.
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Origin of radioactive

  • Adaptation of French radioactif, from radio- +"Ž active.
    From Wiktionary