Transmutationoccursnaturally inradioactivedecay

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Unformatted text preview: o change in mass number (A) or atomic number (Z). · Certain nuclear processes can also lead to a fourth form of radiat ion, called a positron ( e ) 0 + 1 F ¾¾ 17 O + +0 e ®8 1 17 9 Examples: 1. Complete the following equat ions for nuclear decays: 46 21 Sc* ¾ ¾ 46 Sc + ® 21 Sc ¾ ¾ + ­0 e ® 1 4 7 21 2. What nuclide forms when 214 Pb successively emit s two beta particles, then one alpha particle fro m its nucleus. Write successive equat ions showing these changes. 214 82 Pb ¾β¾ + ­ 0 e ¾β¾ + ­ 0 e ¾α ® ® ® ¾ 1 1 4 4 + 2 He Chemistry 52 Chapter 18 TRANSMUTATION OF ELEMENTS · The transformat ion of one element into another by natural or artificial means is called transmutation. · Transmutation occurs naturally in radioactive decay, but transmutation by art ificia l methods was not achieved until 1919 when Ernest Rutherford succeeded in transforming a nitrogen nuclide into an oxygen nuclide by bo mbardment with alpha particles. 14 7 N + 4 He ¾¾ 18 O + 1 H ® 7 2 1 alpha particle · Rutherford’s experiments opened the door to development of many transmutations by bo mbardme...
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