2. Element Groupings

3. I. Alkali Metals A.Group 1A on the periodic table B.Are extremely reactive C.Have one valence electron D.Reactivity increases from top to bottom.

4. II. Alkaline Earth Metals A.Group 2A on the periodic table B.Are moderately reactive C.Have two valence electrons D.Ca and Mg are important biologically in construction and transportation

5. III. Transition Metals A.Found between groups 2A and 3A B.Properties vary C.Form brightly colored compounds

6. IV. Boron Family A.Group 3A on the periodic table B.Members have 3 valence electrons C.Aluminum is the most abundant metal on Earth. Third overall.

7. V. Carbon Family A.Group 4A on the periodic table B.Members have 4 valence electrons C.Carbon containing compounds drive life on earth. (organic) D.Si is the 2 nd most abundant element on earth

8. VI. Nitrogen Family A.Group 5A on the periodic table B.Members have 5 valence electrons C.Nitrogen is the most abundant element in the earth’s atmosphere D.N and P are essential for plant growth

9. VII. Oxygen Family A.Group 6A on the periodic table B.Members have 6 valence electrons C.Oxygen combines with metals to form oxides (rust). It is moderately reactive. D.Most abundant element on earth is oxygen.

10. VIII. Halogens (salt formers) A.Group 7A on the periodic table B.Members have 7 valence electrons C.Combine with metals to form salts D.Most reactive of the nonmetals E.Reactivity decreases from top to bottom.

11. IX. Noble Gases A.Group 8A on the periodic table B.Members have 8 valence electrons (except He). C.Are extremely nonreactive or inert D.Are odorless and colorless

12. X. Rare Earth Elements A.Lanthanide Series- elements 57-70 B.Actinide Series- elements 89-102 C.Many are not natural and radioactive

13. That’s All Folks