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Classical free electron theory could not explain many physical properties. In 1928, Sommerfeld developed a new theory applying quantum mechanical concepts and Fermi-Dirac statistics to the free electrons in the metal. This theory is called quantum free electron theory.
write note on free electron theory
Negative to positive
Electronic theory is the theory of the behavior of the electron under various conditions including a free electron, a bound electron in either an outer or inner orbit of the atom.
free electron model not take into account the potential neither the electron interaction. nearly free electron take into account the potential.J.C. Aguiar
the same way an insulator and a conductor will work with out the electron theory!
There is no single unified theory that explains all correlated electron systems.
Its the Lewis Theory He also made the theory about the electron dot structures
J.J. Thomson's scientific ideas were called the atomic theory. In 1897 he discovered the electron and came up with a new theory that atoms were made up of small particles.
It is still called an "electron".On the other hand, an electron that results from radioactive decay is also known as "beta radiation"; but please note that "beta radiation" may also refer to an antielectron.
an atom
Rutherford.