Match List - I with List - II.
| List – I (Scientist) | List – II (Phenomenon) | ||
|---|---|---|---|
| (A) | Rutherford | (I) | Nuclear Model of atom |
| (B) | A.H. Becquerel | (II) | Plum-Pudding Model of atom |
| (C) | Niels Bohr | (III) | Radioactivity |
| (D) | J.J. Thomson | (IV) | Hydrogen atom model |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
Each scientist is linked with the discovery or the atomic model that bears his name.
(A) Rutherford — this matches (I) Nuclear Model of atom. His α-particle scattering experiment showed that the positive charge and nearly all the mass of an atom sit in a tiny central nucleus.
(B) A.H. Becquerel — this matches (III) Radioactivity. He discovered radioactivity in uranium salts, which gave out penetrating rays without any outside source of energy.
(C) Niels Bohr — this matches (IV) Hydrogen atom model. He explained the hydrogen atom with electrons in stationary orbits of fixed energy.
(D) J.J. Thomson — this matches (II) Plum-Pudding Model of atom. In his model the positive charge is spread through the atom, with the electrons embedded in it like plums in a pudding.
NCERT (2026-27):
Introduction – “… The explanation of the results led to the birth of Rutherford’s planetary model of atom (also called the nuclear model of the atom).”
Radioactivity – “A. H. Becquerel discovered radioactivity in 1896 purely by accident.”
Bohr Model of the Hydrogen Atom – “… It was Niels Bohr (1885 – 1962) who made certain modifications in this model by adding the ideas of the newly developing quantum hypothesis.”
Introduction – “… The first model of atom was proposed by J. J. Thomson in 1898. … This model was picturesquely called plum pudding model of the atom.”