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Question

Why was Thomson’s Model of an atom failed?

i. It could not explain the screening of negative charges from that of positive

ii. It did not tell about the presence of electrons

iii. It did not give an idea about the position of the nucleus

iv. It explained the atom as a whole to be electrically neutral.


A
Only (iii)
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B

Both (i) & (iii)

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C

Only (i)

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D

Both (ii) & (iv)

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Solution

The correct option is B

Both (i) & (iii)


Thomson model of an atom could not explain the stability of an atom, i.e., how a positive charge in the atom holds the negatively charged electrons. It could not explain the position of the nucleus in an atom and the scattering of alpha particles.


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