The atomic diameter is10^-10 m (1 Angstrom)
The atomic nucleus diameter is10^-14 m
The hadrons particles(proton and neutron and mesons ) diameter 10^-15 m (1 Fermi)
The quark diameter 10^-18 m(1 Otto)
The scattering cross section of the electrons and photons 1bran (100 fermi^2 )(10^-28m^2)
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