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2 marksModels of the Atom

CSEC Physics · January 2017 · Paper 2 · Question 6(a)(ii)

Figure 8 shows a typical layout of Rutherford's experiment used to determine the composition of the atom.

Using your knowledge from Rutherford's experiment, explain why it was critically important for him to use the substance or element for the component labelled A.

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Other parts of this question

  1. 6(a)(i)State the names of the components labelled A, B and C.[3 marks]
  2. 6(a)(iii)State TWO conclusions from Rutherford's experiment about the model of the atom.[2 marks]
  3. 6(b)(i)Determine the number of neutrons found in ONE atom of silicon.[1 mark]
  4. 6(b)(ii)Using the same standard notation, state a possible isotope of ²⁸₁₄Si.[1 mark]
  5. 6(c)(i)State the type of decay process that occurred.[1 mark]
  6. 6(c)(ii)Determine the values of p and q.[2 marks]
  7. 6(c)(iii)If element Y then undergoes a beta decay and forms an element Z, write the reaction equation.[2 marks]
  8. 6(c)(iv)How does radioactive decay affect a particle's mass?[1 mark]

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