Discovered by James Chadwick, it was later found to be composed of two down quarks and one up quark.
Helium-3 and Boron-10 are sometimes used to detect this particle. Bothe and Becker's experimentation with beryllium thought that these particles were at first gamma rays. Discovered by James Chadwick, it was later found to be composed of two down quarks and one up quark. When these particles are not bound, they undergo beta decay, emitting a(*) proton, an electron, and an antineutrino, with a mean lifetime of around fifteen minutes. Uranium 235 undergoes fission when one of these particles strikes it, which produces three more of these particles. While carbon 12 has only six of them, carbon 14 has 8 of them. For 10 points, name this subatomic particle that has around the same mass as a proton but has no charge.
Helium-3 and Boron-10 are sometimes used to detect this particle.
{neutron}