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Anonymous users2024-02-09Elementary particles refer to the smallest and most basic units of matter that people know. However, after the quark theory was proposed, people realized that elementary particles also have complex structures, so the term "elementary particles" is generally not mentioned now. According to the different forces, particles are divided into three categories: hadrons, leptons, and propagators[1] Hadron Hadron Hadron is the general term for all particles involved in the action of strong forces.
They are made up of quarks, and there are six types of quarks that have been discovered, and they are: top quarks, upper quarks, lower quarks, singular quarks, quarks, and bottom quarks. Among them, the theory predicts the existence of top quarks, which was discovered in Fermila in the United States on January 30, 2007.
The vast majority of existing particles are hadrons, and protons, neutrons, and mesons all belong to hadrons. (Antimatter has also been discovered, including the famous antiquark, which has been discovered and is being studied for its use, from which we speculate that there may even be anti-earth, anti-cosmos) Lepton Lepton is a general term for particles that only participate in the action of weak forces, electromagnetic forces, and gravitational forces, but do not participate in strong interactions. There are six types of leptons, including electrons, electron neutrinos, electrons, sub-neutrinos, sub-neutrinos, sub-neutrinos.
Electrons, subons, and subons are charged, and all elementary particles and neutrinos are not charged, and all of them.
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Anonymous users2024-02-08Atoms, molecules, ions, electrons, neutrons, protons.
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Anonymous users2024-02-07Elementary particles are a term that refers to what people know to be the smallest or most basic unit of matter. Depending on the force, particles are divided into three categories: hadrons, leptons, and propagators.
Hadron is the general term for all particles involved in the action of strong forces. They are made up of quarks, and there are five types of quarks that have been discovered, and they are: upper quarks, lower quarks, singular quarks, quarks, and bottom quarks.
Theories predict the existence of a sixth quark, named the top quark, but has not yet been discovered.
Lepton is a general term for particles that only participate in weak forces, electromagnetic forces, and gravitational forces, but not in strong interactions. There are six types of leptons, including electrons, electron neutrinos, electrons, sub-neutrinos, sub-neutrinos, sub-neutrinos.
Propagators also belong to elementary particles. There are a total of 8 types of gluons that transmit strong effects.
Elementary particles are much smaller than atoms and molecules, and cannot be observed with the highest possible electron microscopes. Protons and neutrons are only 1/100,000 the size of an atom. Leptons and quarks are smaller in size, less than one-ten-thousandth of a proton or neutron.
1. Elementary particles are much smaller than atoms and molecules, and cannot be observed by existing electron microscopes. Protons and neutrons are only 1/100,000 the size of an atom. Leptons and quarks are smaller in size, less than one-ten-thousandth of a proton or neutron.
2. Elementary particles refer to the smallest and most basic unit of matter, that is, the smallest volume of matter without changing the properties of matter. It is the basis of all kinds of objects, and it does not conclude that it is not a substance because it is small. However, after the quark theory was proposed, people realized that elementary particles also have complex structures, so the term "elementary particles" is generally not mentioned.
Elementary Particle Classification Characteristic Family Charge Mass (Note) Average Life (S) Common Decay Products Antiparticle Lepton Stable - e+ve00 stable - v-ev 00 stable - v- baryon p+stable——,n 0 - n + less than 10 -14 , radiation + meson + radiation 0k++, 0k+ (fast decay mode) ,0 (slow decay mode) +v- ,ev-, v -,e+v k0 (antiparticle) decay in the same way as k0 - k0 , 0 + radiation Note: The mass of the particles in the table is given in the unit of energy 1mev (megaelectron volt). If compared to everyday units, 1MEV is equivalent to working at 1kW of power.
According to the current understanding of the structure of the particle world, according to the standard model, the particle world is composed of 62 kinds of particles, of which 60 kinds have been confirmed by experiments, and there are 2 kinds of evidence of their existence that have not been observed in experiments, which is the limit of segmentation at this stage. >>>More
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