What is the energy level of an electron ?

What is the energy level of an electron ?
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: According to Baer's atomic theory, we know that electrons revolve around the nucleus in a supposed orbit. The radii of these orbits are precise. These orbits involve a certain amount of energy. The energy of the orbit in which the electrons of the atom revolve is contained. The energy of the orbits of the electron is expressed in some as a specific energy level. These layers are called the energy layers of electrons. The energy of the first orbit of the electron is described as the first energy level and the energy of the second orbit as the second energy level.
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