This is a preview of concepts you will cover in much more depth in a few weeks in Chemical Bonding. Bond dissociation energy is the binding energy of two atoms in a covalent bond, a system with negative electron density (bonding electrons) between two positively charged nuclei.
Molecular orbital theory, a quantum theory, accounts for the array of possible states for the system. However, it is still very helpful to use the concepts of classical physics in work & energy and classical electrodynamics to help conceptualize the potential energy of the system. The electrons within the internuclear space, the bonding electrons, exert electric force, holding the nuclei of the bonded atoms within the chemical bond.
To understand the energy description of the covalent bond, it can be helpful to picture bond formation, the reverse of bond dissociation. Picture two unbonded atoms coming together to form a bond. As the two atoms near one another, electron density migrates into the internuclear distance (the space between the atoms), drawing the nuclei inwards. Picture the bonding electrons, a negative charge density, pulling the atoms together, as they fall into a potential energy well.
The WikiPremed MCAT Course is a comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum. Please read our policies on Privacy and Shipping & Returns. Contact Us. MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course. WikiPremed offers the customers of our publications or our teaching services no guarantees regarding eventual performance on the MCAT.
WikiPremed is a trademark of Wisebridge Learning Systems LLC. The work of WikiPremed is published under a Creative Commons Attribution NonCommercial ShareAlike License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions.