Intermolecular and Interatomic Forces (Grade 11 NSC Matric Physical Sciences): Flashcards
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Intermolecular forces
Intermolecular forces
Forces that act between separate molecules
Interatomic forces
Interatomic forces
Forces between atoms within a molecule (chemical bonds)
Polar molecule
Polar molecule
Has δ+ and δ- regions forming a dipole
Hydrogen bonding requirement
Hydrogen bonding requirement
H bonded to N, O, or F
Ion-dipole forces
Ion-dipole forces
Forces between an ion and a polar molecule
Dipole-dipole forces
Dipole-dipole forces
Forces between two polar molecules
Induced dipole forces
Induced dipole forces
Forces between non-polar molecules (temporary dipoles)
Stronger intermolecular forces effect
Stronger intermolecular forces effect
Higher melting/boiling points, higher viscosity
Like dissolves like
Like dissolves like
Polar in polar; non-polar in non-polar solvents
Molecular size effect
Molecular size effect
Larger molecules have stronger intermolecular forces