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Structure of the Atom — Science STD 9 — Question

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

Answer

  1. Thomson's atomic model

Explanation:

 

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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