*P71915A0528*
Turn over
DO
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AERA
SIHT
NI
ETIRW
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AERA
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PMT
Questions 8 and 9 refer to the information below.
Alpha particle scattering investigations were first carried out in the early part of
the 20th century.
The diagram shows the path of an α particle that is being deflected by the nucleus of a
gold atom. The closest distance of approach of the α particle to the nucleus is at point P.
P
nucleus
path of
α particle
Question
Physics
Edexcel2022
*P69306A0628*
PMT
Questions 9 and 10 refer to the information below.
Alpha particle scattering investigations were first carried out in the early part of
the 20th century.
Question
Physics
Edexcel2020
The diagram shows a model used to demonstrate alpha particle scattering. A ball bearing
is set rolling on a wooden track. The track is positioned so that the ball bearing rolls
onto a metal sheet with a curved surface known as a ʻhillʼ.
wooden track
ball bearing
hill
The diagram shows a vertical cross-section through the hill. The surface is curved so that
the height of a point h on the curved surface is inversely proportional to the distance r
from the centre of the hill.
h
r
Question
Physics
Edexcel2020
*P61864RA01328*
Turn over
PMT
(a) Explain why the hill is suitable as a model for the electric field surrounding the
nucleus of an atom.
(3)
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(b) A plan view of the arrangement is shown.
ball bearing
hill
wooden track
The wooden track is moved to different positions and the ball bearing is released.
Describe the results of the alpha particle scattering experiment and how these can be
demonstrated by moving the wooden track to different positions.
(4)
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(Total for Question 14 = 7 marks)