Unit 3: Bonding
Bonds are connections between atoms. A solid grasp of valence shell electron pair repulsion (VSEPR ) theory will help you understand how elements that differ by one or two atomic numbers behave.
According to VSEPR theory, the number of electrons an element has corresponds with its chemical properties. For example, sodium differs from neon and potassium by one atomic number, but it resembles potassium, not neon. Sodium and potassium both have one valence electron, which explains their similar properties, while neon is a stable element with eight valence electrons. We use VSEPR to predict the three-dimensional structure, or geometry, of molecules.
Completing this unit should take you approximately 10 hours.