Which of the following statement(s) about Rutherford's model of an atom is/are correct?
(i) Neutrons have a negative charge.
(ii) The mass and positive charge of the atom are concentrated in the nucleus.
(iii) Neutrons exist outside the nucleus.
(iv) Most of the space in an atom is empty.

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(i) and (iii)

(ii) and (iv)

(i) and (iv)

(iii) and (iv)

answer is B.

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Detailed Solution

Rutherford’s model of an atom explains that there is a nucleus in the centre of an atom and electrons are located around the nucleus. Rutherford’s model of an atom gives an idea about the nucleus of an atom and states that it is inside the atom.
The model says that neutron and protons are present outside the nucleus and states that the mass of an atom is concentrated in the nucleus of the atom. The presence of the nucleus was determined by the α- particle scattering experiment on a gold foil which made him realise that there is a positively charged species inside the atom.
He found that most of the space inside the atom was empty since the α- particle passed through the atom without any deviation; however, a small fraction of the α- particle deviated at large angles proving the presence of a concentrated mass at the nucleus.
The mass and positive charge of the atom is concentrated in the nucleus and most of the space in an atom is empty are the correct statements about Rutherford's model of an atom.

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