1. Daily Objective Students will identify families on the periodic table and will list common characteristics for each family.

2. TOURING THE PERIODIC TABLE Element Families

3. Periodic Table Terminology 1. Periods: Horizontal row of elements in the periodic table. 2. Group (family): A vertical column of elements in the periodic table. (Have the same number of valence electrons) 3. Valence electrons: An electron in the outermost energy level of an atom.

4. The FIRST Periodic Table -Dmitri realized certain properties repeat periodically when the elements are arranged horizontally in order of atomic weight. -He then placed chemically similar elements in vertical columns. -He left empty spaces as needed when an element did not fit the pattern. -From these empty spaces Mendeleev deduced the existence of unknown elements and could predict their properties.

5. Mendeleev Activity

6. The Modern Periodic Table Q:How are the elements arranged? A:The atomic numbers are increasing. Q: What does the atomic number represent? Fact: When Mendeleev published the first periodic table he did not know about subatomic particles.

7. Element Families Metals 1. Shiny 2. Can be stretched, shaped 3. Conduct heat, electricity 4. Found to the left of the table

8. Element Families Nonmetals 1. May be solids, liquids, or gases 2. Dull and brittle 3. Poor conductors of heat and electricity 4. Found to the right of the table

10. Metal Families http://www.youtube.com/watch?v=m55kgyApYrY&safety_mode=true&persist_safety_mode=1 http://www.youtube.com/watch?v=m55kgyApYrY&safety_mode=true&persist_safety_mode=1 Group 1(First column) = Alkali Metals Very reactive with water Soft, shiny One valence electron Form +1 ion They are not found in nature as elements but as compounds.

11. Metal Families Group 2 (second column) = Alkaline-earth metals Less reactive with water than Group 1 Have 2 valence electrons Form +2 ions Form compounds that are found in limestone and in the human body

12. Metal Families Transition Metals The area in the middle Form positive ions Transition metals are able to put more than eight electrons in the second orbital. Used in our everyday lives.

13. Lanthanide Family Rare earth elements

14. Actinide Family -Radioactive elements -Not all of them are found in nature

15. Nonmetal Families Halogens (17 th column) Very reactive gases Gain electron to form a -1 ion

16. Nonmetal Families Noble Gases (18 th column) Inert gases, non-reactive Will not form ions Don’t form compounds

17. Semiconductors/Metalloids Located between metals and nonmetals Have properties of both metals and nonmetals Conduct heat and electricity