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Cambridge IGCSE Chemistry practice

Paper 4 structured question: Isotopes

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Isotopes

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Paper 4Theory (Extended)4 marks

Understanding isotopes and their impact on relative atomic mass.

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Isotopes of Element Y

Element Y has three isotopes: Isotope 1 (mass 14, abundance 50%), Isotope 2 (mass 15, abundance 30%), Isotope 3 (mass 16, abundance 20%).

  1. a

    Determine the relative atomic mass of Element Y.

    Aim for approximately 4 distinct marking points.

    [4]

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Paper 4 structured question: Isotopes

Paper 4Theory (Extended)3 marks

Description

Isotopes of Element X

Element X has two isotopes: Isotope A with a mass of 10 and abundance of 60%, and Isotope B with a mass of 12 and abundance of 40%.

  1. a

    Calculate the relative atomic mass of Element X.

    Aim for approximately 3 distinct marking points.

    [3]