Question

Match the entries given in column A with appropriate ones from column B
$$\begin{array}{cc}\text{Column A}& \text{Column B}\\ \text{(A) Invisible atoms}& \text{(a) Rutherford's atomic model}\\ \text{(B) Mass of an atom is concentrated at the centre}& \text{(b) Dalton's atomic theory}\\ \text{(C) Energy levels}& \text{(c) Thomson's atomic model}\\ \text{(D) Plum pudding model}& \text{(d) Bohr's model}\end{array}$$

• A. A-b B-a C-d D-c
• B. A-b B-a C-c D-d
• C. A-a B-b C-d D-c
• D. A-b B-c C-d D-a

Answer 1

The correct option is A

A-b B-a C-d D-c

Daltons atomic model states that atoms are indivisible, he also described a workable distinction between atom and molecules.

According to Rutherford experiment, a very small fraction of α-particles were deflected by 180⁰, indicating that all the positive charge and mass of the gold atom were concentrated in a very small volume within the atom called nucleus.

Bohr explained the energy levels of the electrons.

Thomson model of an atom is also known as plum pudding model as the electrons, in a sphere of positive charge, were like dry fruits in a spherical pudding.