235U92 ==> 207Pb82
235-207=28=4*7 7 альфа распадов
92-7*2=78 82-78=4 4 бета распада
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235U92 ==> 207Pb82
235-207=28=4*7 7 альфа распадов
92-7*2=78 82-78=4 4 бета распада
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