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Francium is highly radioactive; its longestlived isotope223Fr has a half-life of only _____. - फ्रन्सियस एक अति रेडियो सक्रिय तत्व है; फ्रेन्सियस के अधिकतम दीर्घ आयु वाले समस्थानिक 223Fr की अर्ध आयु मात्र ____ है।

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Francium is highly radioactive; its longestlived isotope223Fr has a half-life of only _____. - फ्रन्सियस एक अति रेडियो सक्रिय तत्व है; फ्रेन्सियस के अधिकतम दीर्घ आयु वाले समस्थानिक 223Fr की अर्ध आयु मात्र ____ है।






 
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