INTERMOLECULAR FORCES (bonds) Occur between molecules Weaker than intramolecular forces.

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Intermolecular Forces

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Presentation transcript:

INTERMOLECULAR FORCES (bonds) Occur between molecules Weaker than intramolecular forces

Hydrogen Bonding One molecule is polar and has a hydrogen in a H-F, H-O, or H-N bond Other molecule has unshared pairs of electrons, usually on F, O, or N ◦ F, N, and O are highly electronegative!!!! Hydrogen forms a weak bond with the unshared pair on the other molecule

Water is a great example of hydrogen bonding

Van Der Waals Bonds Intermolecular attractions resulting from constant motion of electrons Creation of instantaneous dipoles

Van Der Waal Bonds Very Weak!!! Can occur between noble gas atoms and nonpolar molecules