الفهرس 
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Abstract
Far in the past began to suspect that matter despite its appearance of being continuous, possesses a fedinite structure on a microscopic level beyond the direct reach of our senses. This suspicion did not take on a more concrete form until a little over century and a half ago since then the existences of atoms and molecules, the ultimate particles of matter in its common forms, have been amply demonstrated, and their own ultimate particles, electrons, protons, and neutrons have been identified and studied as well.