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Cambridge IGCSE Chemistry practice

What is the relative atomic mass of an element based on?

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Show answerRelative masses of atoms and molecules revisionRevise the key idea

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Relative masses of atoms and molecules

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What is the relative atomic mass of an element based on?.

  1. A.The mass of the most abundant isotope
  2. B.The average mass of all isotopes
  3. C.The mass of the least abundant isotope
  4. D.The mass of a hydrogen atom

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Paper 3 structured question: Relative masses of atoms and molecules

Paper 3Theory (Core)1 marks

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Understanding Relative Atomic Mass

Relative atomic mass is defined as the average mass of an element's isotopes in relation to 1/12th of the mass of a carbon-12 atom.

  1. a

    State the definition of relative atomic mass.

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