Question 18
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order.
(i) Rutherford's atomic model
(ii) Thomson's atomic model
(iii) Bohr's atomic model

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

Q. Question 16
Which of the following in figure do not represent Bohr's model of an atom correctly?



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

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)

Q.

Which of the following pictures represent the Bohr's model of an atom?

(i) (ii) (iii)

Q. 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)

Q. The decreasing order of -I effect of the following hybridisation of an atom is:
I. $sp$ II. $s{p}^2$ III. $s{p}^3$