2. Samples Of
Real
Things
And
Common
Uses

3. More
Samples Of
Elements
And
Common
Uses

4. Atomic Number = number of protons in the nucleus (always a whole number)
Atomic Mass = the mass of an average atom of an element
Ion charge = electric charge that forms on an atom when it gains or loses an electron

5. Any electrically charged atom is called an ion
An atom that has gained an electrons is a negative ion because the extra electrons make it negative
An atom that has lost electrons is a positive ion because the loss of electrons removes negative charge
Some elements have multiple ion charge
These elements can form ions in more than one way

6. PATTERNS!!!!
Elements on the left side of the table generally form positive ions.
Elements on the right side, except for the last column, generally form negative ions.
Elements that are in the same column often form ions with the same charge as other elements in that column.

8. More Patterns!!!
What are other ways to organize elements on the periodic table of elements????

11. Periods & Families Periods = Horizontal rows (ACROSS)
Numbered 1 to 7
Families = Vertical columns (DOWN)
Numbered 1 to 18

13. 4 well-know family groups
The Alkali metals
The Alkaline earth metals
The halogens
The noble gases

15. ACTIVITY TIME