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Structure of the Atom — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceStructure of the Atom1 Mark
MCQ
The atom as a whole is electrically neutral$"$, is a statement proposed by which atomic model:
  • ✓
    Thomson's atomic model
  • B
    Goldstein's atomic model
  • C
    Chadwick's atomic model
  • D
    None of the above
✓

Answer

Correct option: A.
Thomson's atomic model
Thomson proposed that : An atom consists of a positively charged sphere and the electrons are embedded in it.
Thus, the atom is visualized as a pudding or cake of positive charges with raisins $($electrons$)$ embedded into it.
Hence it is the raisin pudding model or watermelon model.
The negative and positive charges are equal in magnitude. So that atoms as a whole are electrically neutral.

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