3. ЯДРО АТОМА / ИЗОТОПЫ / ЧИСЛО НЕЙТРОНОВ В АТОМЕ
*Для поддержки канала:*
Яндекс кошелек 410014732763649
Киви кошелек 9787732500
Рaypal (ссылка для пополнения)
3 months ago 00:29:29 3
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7 months ago 01:39:42 3
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7 months ago 00:23:26 0
7 months ago 03:25:48 1
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7 months ago 00:17:11 1
