GENERAL KNOWLEDGE

Detailed explanation-1: -In 1932, Chadwick made a fundamental discovery in the domain of nuclear science: he proved the existence of neutrons – elementary particles devoid of any electrical charge.

Detailed explanation-2: -Chadwick had discovered the neutron the year before while working at Cavendish Laboratory.

Detailed explanation-3: -James Chadwick In fact, he was the last of a scientific dynasty, with Thomson who discovered the electron, followed by his student Rutherford, who discovered the atomic nucleus and the proton, and finally Chadwick, his student, and discoverer of the neutron.