CHEM 101 Lecture Notes - Lecture 36: Intermolecular Force, Ionic Bonding, Hydrogen Bond

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CHEM 101-Lecture 36-Intermolecular Forces Summary
Ionic bonding
Strongest intermolecular force
Between a metal cation (positive) and a nonmetal anion (negative)
The atoms must have an electronegativity difference greater than 2
Ex: Bond between Na+ and Cl- to form NaCl
http://ellesmere-chemistry.wikia.com/wiki/Ionic_Bond
Ion-dipole forces
Strong attractive force between an ion and the opposite partial charge of a polar
molecule
The polar molecules orient themselves so that their oppositely charged side is facing the
anion
Ex: Salt (NaCl) dissolving in water
https://www.chem.purdue.edu/gchelp/liquids/iondip.html
Hydrogen bonding
Attractive force between molecules that have hydrogen atoms bonded to nitrogen,
oxygen, or fluorine atoms
An extremely strong type of dipole-dipole force; stronger than normal dipole-dipole
forces, but weaker than ionic bonding
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