Protons and neutrons are subatomic particles that make up the nucleus of an atom. They are both composed of smaller particles called quarks and are held together by the strong nuclear force.
Yes, protons and neutrons are considered point particles, meaning they have no internal structure and are treated as single, indivisible particles in most particle physics theories.
Scientists have conducted experiments using high-energy collisions to probe the internal structure of protons and neutrons. These experiments have consistently shown that protons and neutrons behave like point particles, with no evidence of substructure.
No, protons and neutrons are bound together by the strong nuclear force and cannot be separated into smaller particles without breaking the nucleus of an atom. However, under extreme conditions such as in particle accelerators, protons and neutrons can be broken down into their constituent quarks.
No, not all particles in the universe are considered point particles. For example, electrons, which are also subatomic particles, have been shown to have a finite size and are not considered point particles. Other particles, such as photons, are considered to have zero mass and therefore do not have a defined size or point-like nature.