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Relative atomic mass

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How To Calculate Relative Atomic Mass | Chemical Calculations | Chemistry | FuseSchool

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GCSE Science Revision Chemistry "Relative Atomic Mass"

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What is Ar (Relative Atomic Mass)

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GCSE Chemistry - Relative Formula Mass #24

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Calculating relative atomic mass

Relative atomic mass or atomic weight is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to one unified atomic mass unit. The unified atomic mass unit is defined as being ​1⁄12 of the atomic mass of a carbon-12 atom. Since both values in the ratio are expressed in the same unit (u), the resulting value is dimensionless; hence the value is said to be relative.
  • Definition 

  • Other measures of the mass of atoms 

  • Determination of relative atomic mass