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Carbon 12 is assigned a mass of exactly twelve atomic mass:
AVolumes
BUnits
CRatios
DWeights
Answer & Solution
Correct answer: B. Units
1. Atomic masses are all quoted relative to one standard.
2. That standard is a particular carbon isotope.
3. Carbon 12 is assigned a mass of exactly 12 atomic mass unit.
4. Masses of all other atoms are given relative to this standard.
_Source: NCERT Class XI Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_
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