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   radioactivity

   /ˌreɪdɪəʊakˈtɪvɪti/

   noun

   • 1. the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
   • ▪ radioactive substances, or the radiation emitted by these: "an escape of radioactivity"

   Scrabble Points: 22

   • R

     1

   • A

     1

   • D

     2

   • I

     1

   • O

     1

   • A

     1

   • C

     3

   • T

     1

   • I

     1

   • V

     4

   • I

     1

   • T

     1

   • Y

     4

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