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Learning objective

Explain relative atomic mass, A, as the average mass of an element's isotopes in relation to 1/12th of the mass of a carbon-12 atom.

Read the explanation, check the common trap, then practise with flashcards and questions.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE ChemistrySubject contentCore content

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Explain relative atomic mass, A, as the average mass of an element's isotopes in relation to 1/12th of the mass of a carbon-12 atom

  • This point belongs to Relative masses of atoms and molecules, especially Relative masses of atoms and molecules outcomes.
  • You need to be able to explain relative atomic mass, A, as the average mass of an element's isotopes in relation to 1/12th of the mass of a carbon-12 atom.
  • The key ideas to know are Describe, Explain, and Identify.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainIdentify

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This objective helps connect Relative masses of atoms and molecules outcomes to exam-style questions, flashcards, and revision notes for Relative masses of atoms and molecules.

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Paper 3 structured question: Relative masses of atoms and molecules

Paper 3Theory (Core)1 marks

Description

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.

    Aim for approximately 1 distinct marking point.

    [1]
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