Ion Channels: Structure and Function. Ion channels are membrane protein complexes and their function is to facilitate the diffusion of ions across biological membranes. Membranes, or phospholipid bilayers, build a hydrophobic, low dielectric barrier to hydrophilic and charged molecules. They are electrical insulators.
The inert gas xenon (chemical symbol Xe) has an atomic number of 54, and it has 54 protons in its nucleus. The number of neutrons varies, however.
2) What is the strength of an electric field that will balance the weight of an electron? The nucleus of a ^125 Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fmin diameter.It has 54 protons and charge q=+54e. 1 fm = 1 femtometer = 1x10^ -15 Hint: Treat the spherical nucleus as a point...) What is the strength of an electric field that will balance the weight of an electron? The nucleus of a ^125 Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fmin diameter.