Chapter 4 Review

Good morning,


Today we begin the review for Chapter 4. This was a large and complex chapter. Don't worry though, we are going to take it one step at a time and you will be well prepared for the test.


Speaking of the test. It will be this Wednesday. That means we have 2 full days to prepare for it.


All right let's begin.


Step One: We have to go back to Atomic Theory. Yes the whole neutron, electron, proton thing. Here is Bill to explain it


All right, does that ring a bell?


Moving on to the periodic table.
Here is a cool one


Now that we are refreshed with the periodic table, we need to move on to Bohr diagrams....yes I know you all probably call them "boring" diagrams. It is actually a good way visualize the arrangement of electrons.


Let's try it out.


Now on to Ionic and Covalent Bonding


Remember Ionic ----- Usually a METAL bonding to a NON metal. Here, one element gives up the electron and the other element takes it.


Covalent---Sharing of electrons. This involves NON metals.


Now Lewis diagrams.


Remember those dots around the element?

These are the number of electrons in the OUTER or VALENCE shell. Remember that an element is happiest with a full shell, meaning 8 electrons for most elements.


Remember these? Diatomic Elements. Think of it as a "7" plus hydrogen of course.....

Next UP!!--------Naming Compounds.


First lets start with IONIC compounds.


The first part of the name is ALWAYS a METAL!  Take for example Potassium Iodide.

Potassium is a metal---and therefore it is named first.

Iodine is not a metal and therefore comes second in the naming.  You ALWAYS put an "ide" at the end of the name. So it wouldn't be Potassium Iodine but rather Potassium Iodide. Makes sense? Good. Let's now try a few.......

NaCl      MgBr2        AgI       RbF
 Notice that the first element is always a metal and the second is a non-metal. Fun stuff!!




Next up is COVALENT compounds


These involve NON metals


Remember that you name covalent compounds using prefixes such as (Bi, Tri, Di, etc...)


Lastly, we need to review chemical equations.  We will do a few on the board and using the link posted earlier.