Question

what led .to the discovery of the third subatomic particle the neutron​

Answer 1

Explanation:

The essential nature of the atomic nucleus was established with the discovery of the neutron by James Chadwick in 1932 and the determination that it was a new elementary particle, distinct from the proton. ... The discovery of fission led to the creation of both nuclear power and weapons by the end of World War II.

Answer 2

The essential nature of the atomic nucleus was established with the discovery of the neutron by James Chadwick in 1932 and the determination that it was a new elementary particle, distinct from the proton. ... The discovery of fission led to the creation of both nuclear power and weapons by the end of World War II.