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Learning objective

Identify the chemical formulas for the elements and compounds listed in the subject material.

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

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Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE Combined ScienceStoichiometryCore content

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Quick explanation

Identify the chemical formulas for the elements and compounds listed in the subject material

  • This point belongs to Formulas, especially Formulas outcomes.
  • You need to be able to identify the chemical formulas for the elements and compounds listed in the subject material.
  • The key ideas to know are State.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

State

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This objective helps connect Formulas outcomes to exam-style questions, flashcards, and revision notes for Formulas.

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Paper 3 structured question: Formulas

Paper 3Theory (Core)1 marks

Description

Chemical Formulas

Chemical formulas represent the composition of compounds and elements. They indicate the types and numbers of atoms present in a molecule.

  1. a

    Identify the chemical formula for sodium chloride.

    Aim for approximately 1 distinct marking point.

    [1]
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Cambridge IGCSECombined Science resources