Introduction
Video Course
Science Topics
Diagnostic Tests
Physics Flashcards
Orgo Mechanisms
Question Server
Physiology Puzzles
Writing Section
Verbal Reasoning
Web Links
WikiPremed Bundle

Contact Us

Log In
Cart Contents
Checkout

Integrated SequencePhysics Chemistry Organic Biology
The Chemical Bond
Valence electrons and the octet rule
Covalent bonding
Bond Energy
Drawing a Lewis Electron Dot Diagram of a Molecule
Formal Charge
Molecular orbital theory
Orbital hybridization
Resonance
Valence shell electron pair repulsion theory
Electronegativity difference and polarity
Ionic bonding
Lattice Energy
Bonding in Metals

Web Resources



  click if a link is broken



Special points of emphasis

Periodic Properties

The Chemical Bond

Thermochemistry

Ionic bond formation is easier to model than covalent bond formation. In Thermochemistry, we will discuss the important principle known as Hess's Law of Heat Summation, which states that the energy absorbed or evolved in any chemical reaction is fixed and independent of the path of the reaction.

Hess's Law of Heat Summation allows us to imagine a path for ionic bond formation in NaCl, for example, involving simply inputing energy to remove an electron from sodium and donating it to chlorine. The change in system energy that occurs in combining a chlorine atom and a sodium atom to form NaCl equals the sum of the ionization energy of Na and the electron affinity of Cl.



The WikiPremed MCAT Course is a free 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.


Creative Commons License
The work of WikiPremed is published under a Creative Commons Attribution Share Alike 3.0 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. You can use the resources here for commercial or non-commercial purposes, but please give attribution and a link to the production credits and edit history of the resource. For the works here which began as my individual work, please attribute "John Wetzel, an author at wikipremed.com".