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| ο άνθρακας 14C14έχει ραδιενεργό διάσπαση με χρόνο υποδιπλασιασμού ίσο με 5.600 χρόνια | |||
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il C 14 ha un decadimento radioattivo con una vita media di 5,600 anni : 1 phrase in 1 subject |
| Metallurgy | 1 |
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