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Rutherford's model

Chemistry • Models of the Atom • Transitional Reasoning • 1 questions

Rutherford's model Transitional Reasoning Download PDF

Chemistry · Atomic Structure · Chemistry · Models of the Atom

1 Chemistry practice questions on Rutherford's model. Questions that build towards applied reasoning.

Questions

  1. 1.

    A student examining data from an alpha-particle scattering experiment notes that out of 100,000 positively charged alpha particles directed at a thin metal foil, approximately 98,500 travel through undeflected, 1,488 experience slight deflections, and 12 bounce backward at angles greater than 90°. Based on Rutherford's atomic model, which conclusion correctly connects an experimental observation to the atomic feature it confirms?

    • A) The undeflected passage of the vast majority of alpha particles proves that positive charge is uniformly dispersed throughout the entire atomic volume.
    • B) The rare deflections at angles greater than 90° prove that the atom's positive charge and nearly all of its mass are concentrated in an extremely dense, compact nucleus.
    • C) The slight deflections at small angles prove that negatively charged electrons carry most of the atom's mass and are fixed in stationary orbits.
    • D) The undeflected particles prove that electrons are organized into discrete, quantized energy levels situated far from the center.