Your efforts would be greatly appreciated. The Answer Thank you for your question regarding the neutron star state of matter. Or, any text book on astronomy will describe this as well. Due to its massive weight, the core of the star collapses, and crushes together every proton with a corresponding electron turning each electron-proton pair into a neutron. The neutrons, however, can often stop the collapse and remain as a neutron star.
Neutron stars are fascinating objects, because they are the most dense objects known.
They are only about 10 miles in diameter, yet they are more massive than the sun. One sugar cube of neutron star material weighs about 100 million tons, which is about as much as a mountain. Like their less massive counterparts, white dwarfs, the heaver a neutron star gets the smaller it gets. Imagine if a 10 pound bag of flour was smaller than a 5 pound bag. Neutron stars can be observed occasionally as an extremely small and hot star within a supernova remnant.