Correct Answer - Option 1 : J.J. Thomson
CONCEPT:
Plum pudding model of the atom:
- It is also called Thomson atomic model.
- It was proposed by William Thomson in the year 1900.
- This model explained the description of the inner structure of the atom theoretically.
Postulates of Thomson atomic model:
-
Postulate 1: An atom consists of a positively charged sphere with electrons embedded in it.
- Postulate 2: An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude.
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Thomson's atomic model is compared to watermelon. Where he considered:
- Watermelon seeds as negatively charged particles
- The red part of the watermelon as positively charged
EXPLANATION:
- From the above explanation, it is clear that the plum pudding model of the atom was proposed by J.J. Thomson. Hence, option 1 is correct.
