Ch. 5- Types of Compounds

Wrap up

Oxidation Numbers You already know what this is ;) Metals lose electrons and nonmetals gain

electrons when they form ions The charge on the ion is the oxidation number

You use the oxidation number (or ion charge) to write formulas like we have been doing!

Oxidation Number (ion charge) ex.

Vanadium is a transition element with multiple oxidation numbers. Write the names of the following compounds containing vanadium: V2S3, VF4, V2(SO4)3, V2O5

Distillation Ionic and covalent compounds vary enough that

their differences can be used to classify and separate them from one anothero Ex. Separating water from salt by distillation

Definition: is the method of separating substances in a mixture by evaporation of a liquid and subsequent condensation of its vapor

Allotropes Molecules of a single element that differ in

crystalline or molecular structure are called allotropes

Another way to think about it is that allotropes are different forms of the same element

The properties of allotropes are usually different even though they contain the same element

Phosphorus has 3 common allotropes: white , red, black

Carbon: diamond, graphite, fullerenes For the test know the allotropes of phosphorus

and carbon!

Common Name vs. Formal Name

http://www.ivyroses.com/Chemistry/GCSE/Common-and-Trade-Names-of-Chemicals.php

Notice salt, water, ammonia, rubbing alcohol, baking soda, etc