Intramolecular and Intermolecular Forces
• Intramolecular forces are forces (bonds) that hold atoms together within a molecule.
• Intermolecular forces are forces that hold together between molecules
☆intramolecular forces (Forces within a molecule)
•ionic bonding
• covalent bonding
☆intermolecular forces
•hydrogen bonding
-occurs between molecules with a hydrogen bonded to a nitrogen, oxygen, or fluorine
-strongest intermolecular force that we study
•dipole- dipole interactions
-occurs between polar molecules
-second strongest
•london dispersion forces
-Occurs between every single molecule
-Weakest intermolecular forces
☆hydrogen bonding
•occurs when a hydrogen is covalently bonded to a nitrogen, oxygen, or fluorine
-these three elements are electronegative and cause behinden to be positive
-when hydrogen takes on semi- positive charge,It is attracted to negative charges from other molecules
☆ dipole- dipole interactions
•occur when molecule is polar
- interacts with the partial negative end of another polar molecule
☆London dispersion forces
•brief temporarily attractions between molecules that just exist
•weakly attractive forces that are caused by random movement of electrons around the cloud