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Atomic structure

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Question 25

In 1803, John Dalton proposed an early model of the atom, which was later modified in 1897 when J.J. Thomson discovered the electron and proposed the 'plum pudding' model.

Dalton's vs Thomson's Atomic Models

According to Dalton's model:

  • The atom is an indivisible, solid sphere.
  • There are no smaller subatomic particles within the atom.
  • The atom has no internal charge or charge distribution.

Give two differences between Dalton's model of the atom and Thomson's plum pudding model of the atom.

[2]

Atomic structure Questions

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