Undergraduate Rates-Tuition & Fees. All students are under the current tuition rate which is set for the Fall, Spring and Summer semesters and is subject to annual increases. 1  Undergraduate - On Campus or Partially Online.  Undergraduate - Fully Online.
Definition: A single bond is a chemical link between two atoms in which electrons are shared between them. Examples: There is a single bond between the oxygen and each hydrogen in a water molecule (H 2 O). Each of the covalent bonds contains two electrons-one from a hydrogen atom and one from the oxygen atom.
By Anne Marie Helmenstine, Ph.D. Definition: Sigma bonds are covalent bonds formed by direct overlapping between two adjacent atom's outermost orbitals. The single electrons from each atom's orbital combine to form an electron pair creating the sigma bond. Sigma bonds are generally denoted by the Greek letter Ï.