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Question

ইলেকট্রনের ভর-

4.8 \times 10^{- 10}

কিলোগ্রাম

1.57 \times 10^{- 20}

পাউন্ড

9.1 \times 10^{- 28}

গ্রাম

কোনোটিই নয়

ANS : 3

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