Question

In the Thomson’s model of 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 stabilize the atom.

• A. (i), (ii) and (iii)
• B. (i) and (iii)
• C. (i) and (iv)
• D. (i), (iii) and (iv)

Answer 1

The correct option is A

(i), (ii) and (iii)

Explanation for the correct answer is:-

Option (A) (i), (ii) and (iii)

Thomson's Atomic Model:-

1. Thomson assumed that an electron is two thousand times lighter than a proton and an atom is made up of thousands of electrons.
2. He said, that an atom is made up of a positively charged sphere into which negative charged electrons are implanted
3. Electrons and protons have the same magnitude, so the whole atom is electrically neutral.

Postulates of Thomson's Atomic Model:-

1. An atom consists of a positively charged sphere with electrons embedded in it.
2. An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude.

Therefore, the correct answer is (A):- (i), (ii) and (iii).