When was the existence of the neutron confirmed? 1) in ancient times 2) in 1895 3) in 1932 4) in 1969 5) in 1901

The existence of the neutron was confirmed in 1932 by James Chadwick, a British physicist. After a series of experiments, he demonstrated that this uncharged particle was present in atomic nuclei, which was a groundbreaking addition to our understanding of atomic structure and played a crucial role in the development of nuclear physics. This discovery had significant implications, leading to advancements in nuclear energy and medicine. The neutron's neutral charge was pivotal in explaining why atoms could be stable despite the repulsive forces between positively charged protons within the nucleus. Chadwick's work ultimately paved the way for the development of nuclear reactors and other technologies we rely on today.