For 10 points, name this heavier of the two particles in the nucleus, a particle with neutral charge.
These particles make up the humorously named "Swiss cheese" and "spaghetti" phases in certain stars. These particles consist of two down quarks and an up quark and are the heavier of two common baryonic hadrons. This particle may emit electron antineutrinos and electrons to become a proton in the process of (*) beta decay. These particles were discovered in 1932 by James Chadwick. Nuclear fission involves bombardment of nuclei with these particles, and the number of these particles is the difference between the atomic mass and the atomic number. For 10 points, name this heavier of the two particles in the nucleus, a particle with neutral charge.
These particles make up the humorously named "Swiss cheese" and "spaghetti" phases in certain stars.
neutron