Ionic Bonding and Naming. Naming Binary Covalent Compounds.

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Presentation transcript:

Ionic Bonding and Naming

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

Compound Properties Molecular vs Ionic Many properties due to differences in intermolecular forces Ionic > Polar > Covalent

H9 – C3 35, , 42, 43, 46, 49, 59, , , , 81