Though similar to tendons, ligaments connect bone to bone and help to stabilize joints they surround. They are composed mostly of long, stringy collagen fibers that create bands of tough, fibrous connective tissue.
An electron is a negatively charged subatomic particle. It can be either free (not attached to any atom), or bound to the nucleus of an atom. Electrons in atoms exist in spherical shells of various radii, representing energy levels. The larger the spherical shell, the higher the energy contained in the electron.
electron is located in atom outside the nucleus. They are responsible for electricity. electrons are located in the outer part of the atom, with the neutrons and protons located in the center (the nucleus) mass:9.10938215(45) Ã 10â31 kg or 1/1836 of the proton radius:2.8179 Ã 10â15 m.