25-04-2021, Saat: 00:22
(25-04-2021, Saat: 00:17)iman Adlı Kullanıcıdan Alıntı: onaylıyorum








The Neutron was difficult to catch. Other particles can be seen and their actions watched, but the neutron we couldn't see and it left no traces.
James Chadwick
1932