Learning objective

Illustrate how the scattering of alpha particles by a thin metal sheet provides evidence for the nuclear model of the atom, demonstrating that: (a) the nucleus is very small and surrounded by mostly empty space, (b) the nucleus contains the majority of the atom's mass, and (c) the nucleus has a positive charge.

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Exam focus

Cambridge IGCSE PhysicsNuclear physicsSupplement content

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Quick explanation

This point belongs to The atom, especially The atom outcomes.
You need to be able to illustrate how the scattering of alpha particles by a thin metal sheet provides evidence for the nuclear model of the atom, demonstrating that: (a) the nucleus is very small and surrounded by mostly empty space, (b) the nucleus contains the majority of the atom's mass, and (c) the nucleus has a positive charge.
The key ideas to know are Describe, Explain, and Investigate.
Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DescribeExplainInvestigate

Why it matters

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

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Paper 4Theory (Extended)1 marks

Description

In an experiment, alpha particles are directed at a thin sheet of gold. Most particles pass through, but some are deflected at large angles.

a
State the conclusion that can be drawn from the scattering of alpha particles.
Your answer
Aim for approximately 1 distinct marking point.
[1]

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