1. Nonmetals Gases or brittle solids at room temperature. Low melting and boiling points [http://universe-review.ca/I13-14-sulfur.jpg] [http://www.lighthouse.chtr.k12.ma.us/periodic/periodicimages/iodine.jpg]

2. Nonmetals Do not conduct electricity well (insulators). [http://www.lighthouse.chtr.k12.ma.us/periodic/periodicimages/iodine.jpg]

3. Nonmetals Makes up most of the mass of living organisms. [http://www.hawcc.hawaii.edu/math/Courses/Math100/Chapter4/HomeWork/G1/BodyElements.png]

4. Hydrogen Exists as H 2 when alone as an element. (diatomic) Is the most abundant element in the universe. (90%) Click here for hydrogen video

5. Noble Gases Found in group 18 or 8A [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter06/Text_Images/FG06_08-03UN.JPG]

6. Noble Gases Have energy levels full of electrons. (8 valence) –Except Helium! Exist only as elements in nature, no compounds! (chemically inert) [http://wps.prenhall.com/wps/media/objects/476/488316/Ins tructor_Resources/Chapter_09/FG09_32.JPG]

7. Noble Gases Useful in lighting and for insulation purposes (windows!) Some are heavier/denser than air. [http://prl.dcu.ie/gallery/gallery-images/gallery_015.jpg] Click here for a Noble Gas Demo

8. Halogens Found in group 17 or 7A [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Chapter06/Text_Images/FG06_08-03UN.JPG]

9. Halogens All have 7 valence electrons. React easily with Alkali Metals [http://www.webelements.com/webelements/elements/media/kossel-icons/Cl.gif]

10. Halogens Most reactive nonmetals. Exist as diatomic molecules when alone as elements. (F 2, Cl 2, etc..) Click here for Halogen Reactivity Video [http://wps.prenhall.com/wps/media/objects/476/488316/Ins tructor_Resources/Chapter_09/FG09_32.JPG]

11. Mixed Groups [http://cwx.prenhall.com/bookbind/pubbooks/hillchem3/medialib/media_portfolio/text_images/CH08/FG08_16.JPG]

12. Mixed Groups Named for the element at the top of the group. Example: Group 13  Boron Group

13. Mixed Groups Metalloids (or semi-metals) have properties of both metals and non-metals Not Aluminum! [http://www.socorro.k12.nm.us/mars/chapter3/chemistr y/metalloids/insert/table.gif]

14. Mixed Groups Carbon exists as two allotropes – different forms of the same element [http://wps.prenhall.com/wps/media/objects/602/616516/Media_Assets/Cha pter10/Text_Images/FG10_26.JPG]

15. All Carbon: Diamond vs. Graphite [http://itl.chem.ufl.edu/2041_f97/matter/FG11_042.GIF]

16. The “Super Seven” are all diatomic when alone as elements! Both Nitrogen and Oxygen are diatomic as elements (N 2 & O 2 )!