1. PLEASE remember. . . DON”T write everything down 
The Periodic Table
PLEASE remember. . .
DON”T write everything down 

2. Why is the Periodic Table important to me?
It organizes lots of information about all the known elements.

3. Pre-Periodic Table Chemistry …
…was a mess!!!
No organization
Imagine going to a grocery store with no organization!!

4. Dmitri Mendeleev: Father of the Table
rows - increasing atomic weight.
columns - way they reacted.

5. There were some problems…
blank spaces
broke the pattern of increasing atomic weight to keep behaviors together
There were some problems…

6. The Current Periodic Table . . . Moseley
ATOMIC NUMBER!!
The Current Periodic Table Moseley

7. Elements in the same group share chemical and physical properties
Why??
They have the same number of valence electrons.
. . . Like Mendeleev

8. Families
Behave the same

9. Hydrogen What’s happening in this picture??? A family all its own!
Hydrogen is a diatomic, reactive gas.
Hydrogen is promising as an alternative fuel source for automobiles
What’s happening in this picture???

10. Alkali Metals Group 1 not including hydrogen.
Very reactive metals, always combined with something else
Soft enough to cut with a butter knife

11. Alkaline Earth Metals Which is more reactive: Group 1 or Group 2???
Also reactive metals
Several of these elements are important mineral nutrients (such as Mg and Ca
Which is more reactive:
Group 1 or Group 2???

12. Transition Metals groups 3-12 Less reactive harder metals
used in jewelry and construction.

13. Boron Family
group 13
Aluminum metal was once rare and expensive, not a “disposable metal.”

14. Carbon Family Elements in group 14
Contains elements important to life and computers.
Carbon is the basis for an entire branch of chemistry.
Silicon and Germanium are important semiconductors.

15. Nitrogen Family group 15 Nitrogen makes up over ¾ of the atmosphere.
The red stuff on the tip of matches is phosphorus.

16. Oxygen Family or Chalcogens
group 16
Many things that stink, contain sulfur (rotten eggs, garlic, skunks, etc.)

17. Halogens Elements in group 17
Very reactive, volatile, diatomic, nonmetals
Always found combined with other element in nature .
Used as disinfectants and to strengthen teeth.

18. The Noble Gases

19. The Noble Gases How many electrons make you happy? Group 18 Group 8a
VERY stable, gases
“neon” signs
Have a full valence shell.

20. Let’s Review!!!
Name the Group . .

21. Now . . .
Let’s Mix It Up 