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.
Electrons can jump to higher energy levels when they absorb light. An Atom is made of protons, neutrons, and electrons. The electrons circle the nucleus staying within Atomic Orbitals, descrete regions where the electron is most likely to be. Under normal conditions the electrons stay as close to the atom as possible.