1. “Color exists by convention, sweet by convention, bitter by convention; in reality nothing exists but atoms and the void.” Democritus (ca. 460 –ca. 370 B.C.)

2. Understanding Size 1 st cut 2 nd cut

3. 1 st cut14cmjean pocket 2 nd cut7cmfinger 3 rd cut3.5cmeye 4 th cut1.75cm keyboard key

4. 6 th cut.44cmpoppy seed 8 th cut1mmThread 12 th Cut.06mmHuman hair 18 th cut1micronbacteria

5. 19 th cut.5micronlight wave 24 th cut.015 micron cell membrane 31 st cut.0001micron atom!!!

6. http://micro.magnet.fsu.edu/primer/java/sci enceopticsu/powersof10/http://micro.magnet.fsu.edu/primer/java/sci enceopticsu/powersof10/ http://www.purchon.com/chemistry/atoms.htm

8. The Big Picture

13. Periodic Table Organization Extremely organized by….. –Atomic mass Protons + Neutrons = atomic mass –Atomic number Atomic number = number of protons = number of electrons NOTE: the number of protons MUST equal the number of electrons in a stable atom (WHY?)

14. Electrons will enter the third energy level only after the second is full. The third energy level can hold up to 18 electrons. Valence Electrons: Electrons in the outer most shell of an atom. These electrons are involved in chemical bonding

19. How & why atoms combine or Why the universe is run by a teenager

20. Rule #1: Quantity = Quality # Protons determines type of atom, usually determines # of electrons.

21. Each Row has the same number of energy levels Rule #2: Atoms have stereotypes

22. Rule#3 Atoms form cliques Each column or family has the same number of electrons in the outer level

23. Rule #4 Atoms want to be independent

26. Rule #5 If you can’t do it…Fake it Lots of energy stored Less energy stored

27. http://visservices.sdsc.edu/projects/discov ery/http://visservices.sdsc.edu/projects/discov ery/

28. Rule# 6 Always take the easy way or it’s better to have your own then to share Lucky for us!

29. Bonding The Specifics