Ответ:
Свинец
Объяснение:
209/84 Po-----> 2(4/2 He) + 2(0/-1 e) + 201/82 Pb
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Verified answer
Ответ:
Свинец
Объяснение:
209/84 Po-----> 2(4/2 He) + 2(0/-1 e) + 201/82 Pb
===========================================