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प्रश्न
Complete the following nuclear changes:
\[\ce {X \text ->[β] X_1 \text ->[α] X_2 \text ->[α] ^172_69 X_3}\]
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उत्तर
\[\ce {^180_72 X \text ->[β] ^180_73 X_1 \text ->[α] ^176_71 X_2 \text ->[α] ^172_69 X_3}\]
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