The document outlines the objectives related to the classification of elements in families based on their number of valence electrons and shared characteristics. It details the properties of various families, including alkali metals, alkaline earth metals, transition metals, and others, highlighting their reactivity and physical traits. Additionally, it mentions the boron, carbon, nitrogen, oxygen, and halogen families, indicating the composition and reactivity of elements within these groups.

2. Families January 19, 2010

3. Objectives Identify the number of valance electrons in an atom Explain why elements in a family have similar characteristics Describe general properties of the families

5. Alkali Metals Soft, silvery colored metals Very reactive!!! They react violently with water and oxygen so they need to be stored in oil. http://www.lyon.edu/webdata/Users/DMcDowell/GenChem/alkalishow.html

6. Alkali Metals reacting with water:

7. Alkaline Earth Metals Silvery-White Metals Fairly reactive Many are found in rocks in the earth’s crust

8. Transition Metals Malleable Ductile Most are good conductors of electricity

9. Lanthanide Series Actinide Series Shiny, reactive metals radioactive

10. BORON FAMILY Group 3 3 valence electrons Most are metals

11. CARBON FAMILY Group 4 4 valence electrons Contains metals, metalloids, and a non-metal Carbon (C)

12. NITROGEN FAMILY Group 5 5 valence electrons Can share electrons to form compounds Contains metals, metalloids, and non-metals

13. OXYGEN FAMILY Group 6 6 valence electrons Contains metals, metalloids, and non-metals Reactive

14. Most are poisonous; form salts Fairly reactive Poor conductors of electricity Halogens

15. Unreactive Gases at room temperature Noble Gases