Which statement about the Rutherford model of the atom is NOT true ?

There is a positively charged centre in an atom called the nucleus

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Nearly all the mass of an atom resides in the nucleus

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Size of the nucleus is comparable to the atom

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Electrons occupy the space surrounding the nucleus

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Solution

The correct option is C Size of the nucleus is comparable to the atom
Rutherford model states:
(A) As some alpha particles are deflected by some angle (a few through $180^{o}$ ) from the center therefore there is a positively charged center in atom called nucleus.
(B) As a few alpha particles are returned at an angle of 180, therefore positively charged nucleus has about all the mass of an atom.
(C) Since 1 of the 8000, alpha particles is deflected through 180, the size of the nucleus is about 1/10000th size of the nucleus, not comparable to the size of atom.
(D) As nucleus is positively charged therefore negatively charged electrons remain in the space surrounding the nucleus.

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Similar questions

What did Rutherford conclude regarding the atomic mass?
(i) Mass of the atom is uniformly distributed.
(ii) Nucleus of an atom is much heavier than electron.
(iii) Nearly all the mass of an atom resides at the centre of an atom.
(iv) Nucleus of an atom is lighter than the electron.

Which of the following conclusions can be drawn from the Rutherford alpha scattering model?

I. The atom is mostly empty space.
II. Electrons orbit the nucleus of the atom.
III. The atom has a dense, positively charged nucleus.

Statement I- Thomson's atomic model could not explain the result of scattering experiment performed by Rutherford.
Statement II- According to Rutherford, majority of mass was concentrated in a minute, positively charged region (the nucleus) surrounded by electrons.

Q. Following conclusions were drawn from the given figure :
I. There is a positively charged centre in an atom called the nucleus.
II. An atom consists of a positively charged sphere and the electrons are embedded in it.
III. The electrons revolve around the nucleus in well-defined orbits.
IV. The size of the nucleus is very small as compared to the size of the atom
V. Only certain special orbits known as discrete of electrons are allowed inside the atom.
Choose the correct statements.

An early model for an atom considered it to have a positively charged point Nucleus of charge Ze, surrounded by a uniform density of negative charge up to radius R.the atom as a whole is neutral.for this model what is the electric field at a distance r from the nucleus?

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