Neutrons were discovered by

[amp_mcq option1=”James Chadwick” option2=”Ernest Rutherford” option3=”J. J. Thomson” option4=”John Dalton” correct=”option1″]

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UPSC NDA-2 – 2020

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The correct answer is (A) James Chadwick. James Chadwick discovered the neutron in 1932.

The discovery of the neutron completed the basic understanding of the composition of the atomic nucleus, alongside protons.

J. J. Thomson discovered the electron in 1897. Ernest Rutherford, through the gold foil experiment, discovered the atomic nucleus and later identified protons within the nucleus (in 1917-1919). John Dalton is credited with developing the modern atomic theory in the early 19th century.

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