Question detail
Explain why some alpha particles being deflected suggested that positive charge is concentrated in a small nucleus.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and isotopes
Question
Explain why some alpha particles being deflected suggested that positive charge is concentrated in a small nucleus.
Answer
The deflection of some alpha particles indicates that they encountered a concentrated positive charge, which must be located in a small area within the atom. This suggests that the nucleus is small and dense, containing most of the atom's positive charge.
Explanation
This question tests the student's understanding of the evidence from the alpha particle scattering experiment, which led to the development of the nuclear model of the atom. A strong answer demonstrates comprehension of how deflection relates to the structure of the atom.
Common mistake
Misunderstanding Alpha Particle Deflection
Students often think that all alpha particles should be deflected by the nucleus, leading them to believe that the nucleus is large and occupies most of the atom's volume.
Emphasize that only a small fraction of alpha particles are deflected, indicating that the nucleus is small and dense, while most of the atom is empty space.
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