During Rutherford's α-particle scattering experiment, he concluded that:
(i) electrons have a negative charge.
(ii) the mass and positive charge of the atom is concentrated in the nucleus.
(iii) neutron exists in the nucleus.
(iv) most of the space in an atom is empty.

Both (i) & (iii)

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Both (ii) & (iv)

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Both (i) & (iv)

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Both (iii) & (iv)

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Solution

The correct option is B Both (ii) & (iv)
In his gold foil experiment Rutherford observed that most of the alpha particles which are positively charged particles went straight through the foil without any deflection so he concluded that most of the space in the atom is relatively empty. Few alpha particles deflected by large angles with 1800 made him conclude that mass and positive charge is concentrated at the centre of the atom.

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Q. Question 8
Rutherford's a-particle scattering experiment showed that

(i) electrons have negative charge.
(ii) the mass and positive charge of the atom is concentrated in the nucleus.
(iii) neutron exists in the nucleus.
(iv) most of the space in atom is empty.
Which of the above statements are correct?

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (iv)
(d) (iii) and (iv)

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.

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During Rutherford's α-particle scattering experiment, he concluded that: (i) electrons have a negative charge. (ii) the mass and positive charge of the atom is concentrated in the nucleus. (iii) neutron exists in the nucleus. (iv) most of the space in an atom is empty.

During Rutherford's α-particle scattering experiment, he concluded that:
(i) electrons have a negative charge.
(ii) the mass and positive charge of the atom is concentrated in the nucleus.
(iii) neutron exists in the nucleus.
(iv) most of the space in an atom is empty.