एक रेडियो-ऐक्टिव नाभिकीय क्षय निम्नानुसार प्रदर्शित किया गया है-
B तथा A की परमाणु संख्या और द्रव्यमान संख्या क्या होगी ?
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2.5 is the answer please mark me as brainlest
Answered by
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Answer: 2.5 is the answer please mark me as brainlest
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