LT#6: Types of Compounds, IMF's and Properties Flashcards
Which IMF do Ionic Compounds have?
IF
How do you recognize a Non-polar Compound?
A molecular compound with either non-polar covalent bonds or polar covalent bonds with equally distributed charges
Can’t draw line separating charges, bond arrows cancel or molecule has symmetrical shape.
Define Dipole-Dipole Forces (DD)
Partial charge attraction between opposite
ends of two polar molecules.
Define Ionic Forces (IF)
Full charge attraction between cations and anions.
How do you recognize a Polar Compound (Dipole)?
A molecular compound with polar bonds that has an overall charge imbalance.
Polar compounds have a partial positive end and a partial negative end.
You can draw a line separating charges, bond arrows don’t cancel or molecule has asymmetrical shape.
The order of IMF from strongest to weakest is…
IF, HB, DD, LD
Which IMF do Non-polar Compounds have?
LD
How do you recognize an Ionic Compound?
Metal and non-metal atoms transferring electrons forming ionic bonds.
Define London Dispersion Force (LD)
Attractive force between the positive nuclei of atoms in one molecule and the electrons in a neighboring molecule.
The larger the molecule, the greater the attraction.
Which IMF do Polar Compounds have?
DD or HB
How do Intermolecular Forces affect a substance’s properties?
The stronger the intermolecular force a compound can make, the higher its melting point, the more likely it will be a solid at room temperature, and the harder it will be.
Define Hydrogen Bonding (HB)
Strong partial charge attraction between
two polar molecules containing H-F, H-O
and H-N bonds.
Define Intermolecular Force (IMF)
Intermolecular Forces are electrostatic attractions between 2 or more stable molecules or ions.
