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Cambridge IGCSE Physics practice

Paper 3 structured question: The nucleus

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Attempt questionThe nucleus revisionRevise the key idea

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The nucleus

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Paper 3Theory (Core)2 marks

Calculating neutrons in atomic nuclei is essential for understanding isotopes.

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Nucleon and Proton Numbers

An atom has a nucleon number (A) of 30 and a proton number (Z) of 12. Calculate the number of neutrons in the atom.

  1. a

    Calculate the number of neutrons in the atom.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 3 structured question: The nucleus

Paper 3Theory (Core)1 marks

Description

Atomic Structure

An atom consists of protons, neutrons, and electrons. The nucleus contains protons and neutrons, while electrons orbit around the nucleus.

  1. a

    State the definition of proton number.

    Aim for approximately 1 distinct marking point.

    [1]