Q. परमाणु भार का अंतर्राष्ट्रीय मानक है ?

(A) H-1
(B) N-15
(C) O-16
(D) C-12

✅ Correct Answer: (D) C-12

Published by Rakesh Yadav ⭐ 5.76K Points at 19-Mar-2021 03:07 pm in Science

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