If protons were heavier than neutrons, they would decay to neutrons and there would be no positive charge in the nucleus, consequently no atoms. A Universe without atoms would have no stars ...

They gained insight into the structure of atomic nuclei of fermium (element 100) with different numbers of neutrons. Using ...

Rutherford also put out the idea that there could be a particle with mass but no charge. He called it a neutron, and imagined it as a paired proton and electron. There was no evidence for any of ...

The atom's nucleus and electrons are held together by the electromagnetic force—the positive charges of the protons balance the negative charges of the electrons. Neutrons have no charge.

with its electrical charge +1; and (udd) for the neutron, resulting in an overall neutral electric charge. The difference in configurations also means the neutron is just ever so slightly heavier ...