Changes

Current theories consider the electron as a point particle, as no evidence for internal structure has been observed.

Current theories consider the electron as a point particle, as no evidence for internal structure has been observed.

As a theoretical construct, electrons have been able to explain other observed phenomena, such as the shell-like structure of an atom<ref>Massimi, M. (2005). ''Pauli's Exclusion Principle, The Origin and Validation of a Scientific Principle.'' Cambridge University Press. pp. 7–8</ref>, energy distribution around an atom<ref>Mauritsson, J.. "Electron filmed for the first time ever". Lunds Universitet. Retrieved 2008-09-17. http://www.atomic.physics.lu.se/research/attosecond_physics</ref>, and energy beams (electron and positron beams)<ref>Chao, A.W.; Tigner, M. (1999). ''Handbook of Accelerator Physics and Engineering.'' World Scientific. pp. 155, 188. ISBN 981-02-3500-3.</ref>.

As a theoretical construct, electrons have been able to explain other observed phenomena, such as the shell-like structure of an atom,<ref>Massimi, M. (2005). ''Pauli's Exclusion Principle, The Origin and Validation of a Scientific Principle.'' Cambridge University Press. pp. 7–8</ref> energy distribution around an atom,<ref>Mauritsson, J.. "Electron filmed for the first time ever". Lunds Universitet. Retrieved 2008-09-17. http://www.atomic.physics.lu.se/research/attosecond_physics</ref> and energy beams (electron and positron beams).<ref>Chao, A.W.; Tigner, M. (1999). ''Handbook of Accelerator Physics and Engineering.'' World Scientific. pp. 155, 188. ISBN 981-02-3500-3.</ref>

==References==

==References==

<references/>

<references/>

==See Also==

==See also==

*[[Protons]]

*[[Protons]]

*[[Neutrons]]

*[[Neutrons]]

*[[Aufbau principle]]

*[[Aufbau principle]]

[[category:physics]]

[[Category:Physics]]