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एक रेडियो-एक्टिव पदार्थ का अर्ध जीवन 60 मिनट है। 3 घंटे में परमाणु की कुल संख्या का वह भाग जो क्षय होगा‚ वह है −

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एक रेडियो-एक्टिव पदार्थ का अर्ध जीवन 60 मिनट है। 3 घंटे में परमाणु की कुल संख्या का वह भाग जो क्षय होगा‚ वह है −






 
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