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In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure - AQA - A-Level Chemistry - Question 7 - 2018 - Paper 3
Question 7
In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure. When He<sup>2+</sup> particles were fired at a thin sheet... show full transcript
Worked Solution & Example Answer:In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure - AQA - A-Level Chemistry - Question 7 - 2018 - Paper 3
Step 1
What conclusion can be drawn from the detection of He<sup>2+</sup> particles at point P?
Answer
The detection of He<sup>2+</sup> particles at point P suggests that gold atoms are mainly empty space. This conclusion is drawn from the fact that most particles passed through rather than being deflected, indicating a mostly unoccupied area with relatively few particles present. Therefore, the correct answer is:
D Gold atoms are mainly empty space.