Word Count : 175

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रेडियम-226 के अल्फा क्षय की प्रक्रिया है: [ ^{226}*{88}\text{Ra} \rightarrow , ^{222}*{86}\text{Rn} + , ^{4}_{2}\text{He} ] सबसे पहले, मास दोष (mass defect) निकालते हैं: [ \Delta m = m(\text{Ra}) ___ _________ _________ ____ _________ ______ ________.
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