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The electron is a fundamental particle with spin. 
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The electron can be described as a Point Charge spinning around its Center of Mass, at the speed of light. 
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The mass is just a reflection of the Energy of the spinning charge.

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This model allows negative charges to “attract” each other at short distances

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Electrons can form stable “bound” states with spin=1, allowing boson condensates, like in superconductivity.

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Electrons have an internal frequency, associated to the spinning motion of the CC and which depends on the velocity of its CM. Therefore, a beam of electrons of the same velocity can show a wave behavior when interacting with a slit or a hole, thus producing a diffraction pattern.

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Matter are particles with some internal frequency and therefore an internal clock whose frequency depends on its CM velocity. 
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Spinning electrons can tunnel through potential barriers.
