Question 7
In the Thomson's model of an atom, which of the following statements are 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 stabilise the atom.

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

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Solution

The answer is (a).
Points (i), (ii) and (iii) are correct. According to Thomson' model of the atom; an atom consists of a sphere of positively charged with negatively charged electrons embedded in it. These negative and positive charges in an atom are equal in magnitude, due to which an atom is electrically neutral.

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Similar questions

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)

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)

Q. According to Thomson model, the mass of the atom is assumed to be uniformly distributed over the atom.

Q. Question 5
Which of the following statements about Rutherford's model of atom are correct?
(i) Considered the nucleus as positively charged.
(ii) Established that the a-particles are four times as heavy as a hydrogen atom.
(iii) Can be compared to solar system.
(iv) Was in agreement with Thomson's model.

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

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.

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Thomson's Atomic Model

Standard IX Chemistry

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