1. Atoms, elements, and the periodic table

2. Lesson Outline Categorizing the periodic table
Group-related periodic patterns
Period-related periodic patterns
Question of the day
Lewis dot structures

3. Learning Expectations
Understand what groups and periods are on the periodic table
Identify specific groups on the periodic table
Draw Lewis Dot Structures of elements on the periodic table

4. The Periodic Law
States that the chemical and physical properties of the elements repeat in a regular, periodic pattern when they are arranged according to their atomic size.

5. Periodic Table Handout
1. Identify the following on the front side of the periodic table handout:
Metals and non metals
Metalloids (staircase)
Transition metals
Alkali metals
Alkaline earth metals
Halogens
Noble Gases
2. Define and note the importance of the following in your course notes:
Metalloids

6. The Period-related pattern
Rows that run horizontally on the periodic table are known as periods.
Every period on the periodic table identifies the number of electron energy shells that each element contains.
Increasing energy shells
Note Periods on the backside of the handout!

7. Question of the day!?!?!
If a 1/4 slice of pie is 3 times larger then all other slices in the pie, how many slices are in the pie?

8. Lewis Dot structures Ex. Na and Cl
Lewis Dot structures: represent elements and the valence shell electrons of their atoms
Rules for drawing Lewis Dot Structures:
Replace the nucleus of the atom with the atomic symbol of the element.
Determine the number of valence shell electrons in the element.
Electrons are only placed at the north, east, south, and west section around the atomic symbol.
Place electrons in a clockwise fashion around the atomic symbol, starting at the north.
Ex. Na and Cl
Draw the first 18 elements on the periodic table

9. Group-Related Pattern
Colum's on the periodic table are known as groups!
Valence shell electrons: The electrons that occupy the outer energy shell of an atom.
As you travel from left to right on the periodic table (excluding the transitions metals) elements have an increasing number of valence shell electrons.
Increasing valence shell electrons

10. The Stable Octet Rule
All atoms want to have a full outer shell (Stable Octet) of electrons because it is stable!
Atoms can gain or lose electrons, pending on what is an easier method to obtain a full outer shell. When they do so, the will acquire a charge because of the new difference in amounts between protons and electrons.
Ex. Lithium
List all group charges on the backside of the handout

11. Success Criteria I can successfully…
Explain Sections of the periodic table (etc. noble gases, halogens)
Determine the Valence Charge of Periodic Groups
Draw the Lewis Dot Structure of an atom