Learning objective

State that relative molecular mass, M, is calculated by adding together the relative atomic masses. For ionic compounds, the term relative formula mass, M, will be used instead.

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Exam focus

Read the explanation.
Check key terms.
Practise with linked questions.

Cambridge IGCSE ChemistrySubject contentCore content

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Quick explanation

State that relative molecular mass, M, is calculated by adding together the relative atomic masses. For ionic compounds, the term relative formula mass, M, will be used instead

This point belongs to Relative masses of atoms and molecules, especially Relative masses of atoms and molecules outcomes.
You need to be able to state that relative molecular mass, M, is calculated by adding together the relative atomic masses. For ionic compounds, the term relative formula mass, M, will be used instead.
The key ideas to know are Define, Describe, and List.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DefineDescribeList

Why it matters

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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