Consider the following statements regarding Thomson's model of an atom. Statement I: The atom is a sphere of positive charge with electrons scattered inside it. Statement II: Thomson's model could explain the presence of the nucleus in an atom. Which of the following is TRUE?
Only statement I is true
J. J. Thomson proposed that an atom is a sphere of positive charge in which the electrons are embedded, like seeds in a watermelon or plums in a pudding. The positive and negative charges are equal, so the atom as a whole is neutral.
Statement I describes exactly this picture, so it is true.
Statement II is false. In Thomson's model the positive charge is spread uniformly through the whole sphere; there is no small, dense, positively charged centre. The nucleus was proposed later by Rutherford from his alpha-particle scattering experiment, which Thomson's model could not explain.
So only Statement I is true.
Hence, Only statement I is true.
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