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元素周期表中的第一種放射性元素
First radioactive element in the Periodic Table.
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不,是锝-藥用
No it's technetium - Officialpen
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實際上,這個標題應該是锝-bstrz04
Actually, that title would go to Technetium - bstrz04
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實際上,第一個沒有穩定同位素的元素是锝-bstrz04
Actually, the first element without any stable isotopes is Technetium - bstrz04
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