Per NCERT, who discovered the NEUTRON, by what experiment, and in what year?
AChadwick (1932), by bombarding a thin sheet of beryllium with α-particles
BRutherford (1919), by gold-foil scattering
CMillikan (1906), by oil drop
DThomson (1897), by cathode-ray deflection
Answer & Solution
Correct answer: A. Chadwick (1932), by bombarding a thin sheet of beryllium with α-particles
Per NCERT §2.1.4, Chadwick bombarded Be with α in 1932 and detected neutral particles slightly heavier than protons.
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