What are Epididymitis and Orchitis? Pain in the scrotum or testicle (âtesteâ) might be from epididymitis, orchitis or both. Epididymitis is swelling or pain in the back of the testicle in the coiled tube (epididymis) that stores and carries sperm.
Share. By Anne Marie Helmenstine, Ph.D. Definition: Valence bond theory is a chemical bonding theory that explains the bonding between two atoms is caused by the overlap of half-filled atomic orbitals. The two atoms share each other's unpaired electron to form a filled orbital to form a hybrid orbital and bond together.
According to valence bond theory, a(n) ____ bond is formed by the overlap of orbitals from two atoms. In order to explain the observed bond angles in many species it is proposed that the atomic orbitals first form _____ orbitals, which differ from the orbitals of the isolated atoms. is a single bond.