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Thomson's model Transitional Reasoning Practice

Chemistry · Atomic Structure · Chemistry · Models of the Atom

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

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Questions

  1. 1.

    Following the discovery of the electron in cathode ray experiments, J.J. Thomson proposed an atomic model to account for both subatomic negative particles and the observed electrical neutrality of bulk matter. In this model, the atom is treated as a continuous entity rather than an indivisible particle or an open structure with a dense core. Which statement correctly describes how electric charge and matter are organized according to Thomson's atomic model?

    • A) Most of the atom's mass and its entire positive charge are concentrated in an extremely dense central nucleus, with electrons moving through empty space around it.
    • B) The positive charge is distributed uniformly throughout the entire spherical volume of the atom, with negatively charged electrons embedded within it to maintain electrical neutrality.
    • C) The atom is a completely solid, indivisible sphere of neutral matter lacking internal subatomic components or separated regions of electric charge.
    • D) Negatively charged electrons revolve around a positively charged core in fixed, circular orbits of discrete and quantized energy levels.

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