Why only carbon-12 is taken as a standard atomic mass unit... 🤓🤓??

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Why Carbon 12?

Assertion: One atomic mass unit is defined as one twelfth of the mass of one carbon - 12 atom.\n....

If the atomic mass unit 'u' were defined to be 1th5 of the mass of an atom of C12, what would be....

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Assertion(A) One atomic mass unit is defined as one twelth of the mass of one carbon-12 atom.

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What is Relative atomic mass and Carbon 12?

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