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Neutronium, hypothetical nuclei consisting only of neutrons (more than one). Examples include the tetraneutron. Preons were suggested as subparticles of quarks and leptons, but modern collider experiments have all but ruled out their existence. Rishons, particles from the Rishon model of preons. From superseded and obsolete theories
Elementary particles are particles with no measurable internal structure; that is, it is unknown whether they are composed of other particles. [1] They are the fundamental objects of quantum field theory. Many families and sub-families of elementary particles exist. Elementary particles are classified according to their spin.
Hypothetical composite particles (1 C, 16 P) H. Hypothetical elementary particles (45 P) M. Magnetic monopoles (10 P) T. Tachyons (6 P) Pages in category ...
Hypothetical particles and states of matter that have not yet been encountered, but whose properties would be within the realm of mainstream physics if found to exist. Several particles whose existence has been experimentally confirmed that are conjectured to be exotic hadrons and within the Standard Model .
As of 1 Jan 2024: Uue–Uoq (E119–E184) are listed here by systematic name. That is 66 articles, of which 6 are articles, and 60 are redirects. E172 is predicted to be the end of period 8 ("noble gas", though it may well be reactive or a solid or liquid); in which case E173 would mark the start of period 9.
Pages in category "Hypothetical elementary particles" The following 44 pages are in this category, out of 44 total. This list may not reflect recent changes.
Hypothetical compounds are used in some thought experiments. Some compounds long regarded as hypothetical have later been isolated. Ethylene dione was suggested in 1913 and observed spectroscopically in 2015. [1] Another stable compound, potassium trichromate, has been produced in a small scale and is known to be a very powerful oxidizing agent ...
Hypothetical particles (4 C, 19 P) Q. Quasiparticles (1 C, 52 P) T. Tachyons (6 P) Pages in category "Subatomic particles" The following 11 pages are in this category ...