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What exactly is a neutron?
A neutron is a subatomic particle contained in the atomic nucleus. It has no electric charge, unlike the proton's positive electric charge. The number of neutrons in an atomic nucleus determines the isotope of that element. It's weight is one so makes up part of the atomic mass.
Where did the neutron come from?
So after this experiment what do we know about the nucleus of an atom?
The neutron was discovered by James Chadwick
By Hugh and Coker
This is a diagram of the experiment Chadwick used.
This is just a quick reminder of what has been said, for notes.