Neutrons were discovered by

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NDA (Held On: 6 Sep 2020) General Ability Test Previous Year paper

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Answer 1

CONCEPT:

NEUTRONS:

In 1932, J. Chadwick discovered another subatomic particle which had no charge and a mass nearly equal to that of a proton. It was eventually named as a neutron.
Neutrons are present in the nucleus of all atoms, except hydrogen.
In general, a neutron is represented as ‘n’.
The mass of a neutron is 1.6750 x 10^-27 kg.
The mass of an atom is therefore given by the sum of the masses of protons and neutrons present in the nucleus.

EXPLANATION:

Neutrons and protons are found in the nucleus of an atom.
Neutrons were discovered by James Chadwick. Therefore option 1 is correct.

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