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Difficulty: EasyAtomic Models

In J. J. Thomson's plum pudding model of the atom, how is the positive charge distributed throughout the atom?

  1. It is uniformly spread throughout a spherical volume containing embedded electrons.Answer
  2. B
    It is concentrated in a tiny, dense central core called the nucleus.
  3. C
    It orbits around a central cluster of negative charges in fixed energy levels.
  4. D
    It is localized entirely on the outer surface of a hollow atomic shell.

Answer

The positive charge is uniformly spread throughout a spherical volume containing embedded electrons.
In J. J. Thomson's plum pudding model, the atom is envisioned as a continuous sphere of positive charge within which negatively charged electrons are embedded evenly to maintain overall electrical neutrality.

Step-by-Step Solution

1
Recall the fundamental proposal of Thomson's atomic model (1897).
J. J. Thomson envisioned the atom as a sphere of positive electrification.
This accounted for atomic neutrality following his discovery of the electron.
2
Identify the arrangement of electrons within this positive sphere.
Electrons were thought to be embedded throughout the positive sphere like plums in a pudding.
This balanced the positive charge uniformly across the atomic volume.

Key Concept

Thomson's Plum Pudding Atomic Model
Estimated Time:45s
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Topics

Atomic Models

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