Состав атомного ядра: 1. кюрия – 247
2. урана-235, 238,
3. неона – 20, 21 и 22,
4. натрия – 23,
5. серебра – 107,
6. радия – 226,
7. менделевия - 257,
8. свинец -207,
9. германий – 73.
(расписать A, Z)​
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