1 4,18. 2  Shingles in caused by the same virus that causes chickenpox-varicella-zoster virus. 3  Shingles is a painful infection of the nerve supplying an area of skin and is accompanied by a localised skin rash.
The electrons on the outermost energy level of the atom are called valence electrons. The valence electrons are involved in bonding one atom to another. The attraction of each atomâs nucleus for the valence electrons of the other atom pulls the atoms together.
Describe: Potential Energy in Atoms. a. the more distant electrons are from the nucleus, the greater their potential energy. b. changes in the potential energy of electrons can occur only in steps of fixed amounts. c. an electron cannot exist between its fixed states of potential energy. Define: Energy Levels.