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.
A covalent bond is a chemical bond formed by the sharing of a pair of electrons between atoms. The bonding in hydrogen. chloride, HCl, is covalent bonding. More detail will be given later in the notes on covalent bonding.attice energy (lattice enthalpy) is the change in energy that occurs when an ionic solid is separated into isolated ions in the gas phase. In general, strength of ionic bonds and lattice energy are directly proportional. A large value in the lattice energy indicates a. strong ionic bond and vice versa.