NCERT Exemplar Solutions Class 9 Science Solutions for Structure of the Atom - Exercise in Chapter 4 - Structure of the Atom
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In Thomson’s model of the atom, which of the following statements is correct?
(i) the mass of the atom is assumed to be uniformly distributed over the atom
(ii) the positive charge is assumed to be uniformly distributed over the atom
(iii) the electrons are uniformly distributed in the positively charged sphere
(iv) the electrons attract each other to stabilize the atom
(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (i), (iii) and (iv)
Answer is(a) (i), (ii) and (iii)
Explanation:
Thomson proposed that negatively charged electrons are stabilized by positively charged protons in the nucleus. Hence option II) the positive charge is assumed to be uniformly distributed over the atom is the wrong statement and other statements are part of Thomson’s model of the atom.
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