Ionic Bondingand Naming

Naming Binary Covalent Compounds

Naming Binary Covalent Compounds

Shapes of Compounds

• You will get a good feel for shapes in lab 5

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?

Polar Covalent Bonds

Polar Covalent Bonds

Polar Covalent Bonds

Compound PropertiesMolecular vs Ionic

• Many properties due to differences in intermolecular forces

• Ionic > Polar > Covalent

H9 – C3

• 35, 37 - 40, 42, 43, 46, 49, 59, 65 - 67, 70 - 73, 75 - 77, 81