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Atomic structure

Atomic structure

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Question 12

In the Geiger–Marsden alpha particle scattering experiment, a beam of alpha particles was directed at a thin gold foil. Two main observations were made:

  • Observation 1: The vast majority of alpha particles passed through the gold foil with little to no deflection.
  • Observation 2: A tiny fraction (about 1 in 8000) of the alpha particles were deflected through angles greater than 90∘90^\circ90∘.

Which of the following correctly matches these observations to the conclusions drawn about atomic structure?

A

Observation 1: The positive charge is spread uniformly throughout the atom. Observation 2: The atom consists mostly of empty space.

B

Observation 1: The atom consists mostly of empty space. Observation 2: The positive charge and most of the mass of the atom are concentrated in a tiny, dense nucleus.

C

Observation 1: Electrons are arranged in discrete, stable energy levels. Observation 2: The atom behaves as an indivisible, solid sphere.

D

Observation 1: The positive charge and most of the mass of the atom are concentrated in a tiny, dense nucleus. Observation 2: The atom consists mostly of empty space.

Markscheme

Atomic structure Questions

  1. GCSE
  2. /Chemistry
  3. /Atomic structure

77 exam-style questions on OCR GCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.

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