How elementary particles form matter

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SUMMARY

The discussion centers on the formation of matter from elementary particles, which are considered point-like and lack physical extension. It emphasizes that electromagnetic interactions are fundamental in preventing objects from passing through each other, as seen when a hand cannot penetrate a table. The conversation also highlights that over 99% of what is perceived as matter is actually empty space, challenging common perceptions of physicality. This understanding is crucial for grasping the nature of matter in the universe.

PREREQUISITES
  • Understanding of elementary particles and their properties
  • Knowledge of electromagnetic interactions
  • Familiarity with atomic structure, including nuclei and electrons
  • Basic grasp of concepts related to matter and physical extension
NEXT STEPS
  • Research the role of electromagnetic forces in atomic structure
  • Explore the concept of empty space in quantum physics
  • Learn about the Standard Model of particle physics
  • Investigate the implications of point-like particles in theoretical physics
USEFUL FOR

Students of physics, researchers in particle physics, and anyone interested in the fundamental nature of matter and its interactions.

LeInvertedPenguine
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Hello,

So i wonder how elementary particles which are said to have no physical extension on a larger scale are able to form what is known to us as matter? Aka stuff with an observable physical extension.
 
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That elementary particles are point-like does not mean that they cannot interact at a distance. What stops you from smashing your hand through the table is really electromagnetic interactions between the molecules in the table and the molecules in your hand. Just as it is electromagnetic interactions that keep the molecules together. Most of what you experience in everyday life that is not due to gravity is due to electromagnetic interactions.
 
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The nucleus and electrons in atoms are not touching - they are about an Angstrom apart.
 
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LeInvertedPenguine said:
Hello,

So i wonder how elementary particles which are said to have no physical extension on a larger scale are able to form what is known to us as matter? Aka stuff with an observable physical extension.
To add to what others have already said, 99%+ of what you think of as matter with "observable physical extension." in 3D is actually totally empty space.
 
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Ok, thanks everyone! Your answers helped me understand how i went about it wrong :)
 

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