View
252
Download
6
Category
Tags:
Preview:
Citation preview
Ionic Bonding
• What can Cl do to be like a noble gas?– Which is more likely?– What will be its charge?
• What can Mg do to be like a noble gas?– Which is more likely?– What will be its charge?
• How will Mg and Cl combine?
Ionic Bonding
• Always a metal with a non-metal
• Metal forms a positive ion, cation
• Non-metal forms a negative ion, anion
• Combine at ratios to have neutral charge
• Formula just gives ratio not molecule!
Polyatomic Ions
• Covalent group with a charge– Not a molecule
• Keep together
• Often use parenthesis
Naming Ionic Compounds
• Metal always goes first
• Put “ide” on the end of the non-metal name
• MgS ?
• AlN ?
• KF ?
Freezing Point depression
• Ionic compounds often used to lower freezing point of water– Melting ice on sidewalks– Making ice cream?
Compound PropertiesMolecular vs Ionic
• Many properties due to differences in intermolecular forces
• Ionic > Polar > Covalent
Recommended