i think 1956 but not sure
Rutherford discovered that almost entire mass of an atom is located in the nucleus, and then, the neutron was discovered by Chadwick.
Neutron
He Began He Reasearch In 1803 But Did Not Find His Answer Untill 1832 .
Sir James Chadwick discovered it in 1932
diarea and farts in a jar
James Chadwick discovered the neutron in 1932.
Edwin Chadwick discovered that it was possible to have a more sanitary work environment. He was a lawyer and proponent of cleaner working conditions in all aspects of public health.
neutrons! see: 2nd paragraph Chadwick's experiment to discover the neutronshttp://library.thinkquest.org/C001124/gather/aexp.html
That sounds like the neutron.
The neutron was discovered by James Chadwick in 1932.
the paticle that was hard to detect was neutrons because it had no electrical charge.
the paticle that was hard to detect was neutrons because it had no electrical charge.