SSC CHSL 2023 PYQ — Question 40

The correct answer is Option 1 i.e. J. Chadwick.

 

Neutrons were discovered by James Chadwick in 1932. He conducted experiments involving the bombardment of beryllium with alpha particles, which led to the emission of a neutral radiation. Chadwick identified this radiation as a new type of subatomic particle — the neutron — which had no electric charge but a mass nearly equal to that of a proton. His discovery was a breakthrough in nuclear physics and helped explain atomic structure more accurately, paving the way for nuclear fission research.