Question

In 1932, James Chadwick, an English physicist, discovered the subatomic particle called

• A. Proton
• B. Electron
• C. Neutron
• D. Nucleon

Answer 1

The correct option is C

Neutron

The explanation for the correct option:

(C) Neutron: It was discovered by James Chadwick, in 1932.

• It is one of the constituents of atomic nuclei and it does not have an electric charge over it.

The explanation for the incorrect option:

(A) Proton: It was discovered by Ernest Rutherford, in 1917.

• It is one of the constituents of atomic nuclei and it has a positive charge over it.

(B) Electron: It was discovered by JJ Thomson in 1897.

• It is the type of particle present that forms an atom and it has had a negative charge over it.

(D)Nucleon:

• It is the combination of a neutron and proton present in the nucleus.
• The overall charge over it is positive.

Hence, the correct option is an option (C).