Respuesta :
Answer:
James Chadwick
Explanation:
In May 1932 James Chadwick announced that the core also contained a new uncharged particle, which he called the neutron
James Chadwick
He was a physicists and concluded in 1932 that the mass of an atom was located in its nucleus
He was a physicists and concluded in 1932 that the mass of an atom was located in its nucleus