According to Thomson’s model, how are electrons arranged in an atom?
Embedded in a positively charged sphere like seeds in a watermelon
J.J. Thomson's atomic model (1904), also called the Plum Pudding Model, proposed that:
- An atom is a sphere of uniformly distributed positive charge.
- Electrons are embedded in this sphere like plums in a pudding, or like seeds in a watermelon.
This model was superseded by Rutherford's nuclear model (1911) after the gold-foil alpha-particle scattering experiment showed that most of an atom's mass is concentrated in a tiny, dense, positively charged nucleus.
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