 The figure depicts an early atomic model. In this model:
APositive charge is uniformly distributed throughout the atom and electrons are embedded randomly inside it
BElectrons exist only at quantized energy levels in stationary orbits
CThe atom is mostly empty space with a dense, positively charged nucleus
DPositive charge is concentrated at the centre; electrons revolve in fixed orbits
Answer & Solution
Correct answer: A. Positive charge is uniformly distributed throughout the atom and electrons are embedded randomly inside it
This is **Thomson's plum-pudding model**: a uniformly positively charged sphere with negatively charged electrons embedded inside it like 'plums' in a pudding.
- Option A describes a generic planetary picture (vague — closer to Rutherford or Bohr).
- Option C is **Rutherford's nuclear model**, which followed Thomson's.
- Option D is **Bohr's model**, which followed Rutherford's.
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