When Beryllium is bombarded with alpha particle some stream of particles are found to be coming out. First such an experiment was done by Bothe and Becker. But they mistook those particles coming out as intense gamma radiation as it was not deflected by magnetic or electric field. Later the same experiment was done by Fredrick Joliot and his wife Irene Joliot. They too lost the chance of finding that as neutron. Finally James Chadwick did the same experiment and found precisely the particles having almost equal mass as that of proton and not having any charge. He named that one as Neutron.
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When Beryllium is bombarded with alpha particle some stream of particles are found to be coming out. First such an experiment was done by Bothe and Becker. But they mistook those particles coming out as intense gamma radiation as it was not deflected by magnetic or electric field. Later the same experiment was done by Fredrick Joliot and his wife Irene Joliot. They too lost the chance of finding that as neutron. Finally James Chadwick did the same experiment and found precisely the particles having almost equal mass as that of proton and not having any charge. He named that one as Neutron.
The neutron was discovered by James Chadwick in 1932.
Neutrons consist of small particles, called "Quarks". Protons also consist of quarks, but what quarks is made of, is still not discovered.
Neutrons were discovered last, probably due to the lack of an electric charge. An electric charge would make the neutron more obvious for a variety of experiments.
Positive charge particles are called Protons Negatively charged particles are called Electrons Neutrons have no charge Protons was discovered by Ruther Ford Electrons was discovered by JJ Thompson Neutons was discovered by James Chadwick
There are 3 subatomic particles in an atom, electrons, protons, and neutrons. The first discovered was the electrons by J.J. Thomson in 1897. The second discovered was the protons by Ernest Rutherford in 1919. The third discovered was the neutrons by James Chadwick in 1932.