1. Organize my grocery list so that I can be more efficient: Peanut butter Milk Ground beef Cucumber Frozen corn Fish sticks strawberries Bread Frozen waffles Cheese Cheerios Sliced ham Ice cream

2. What are some of the ways you organized the grocery list? Alphabetical Aisle Frozen foods Food groups Animal/plant products Processed/natural foods

3. The periodic table has a lot of information organized in different patterns: Periods – horizontal rows - elements have the same number of electron shells Groups – vertical columns - elements in the same group have similar chemical properties Staircase – separates metals and non- metals

4. Trend 1: Periods Periods – horizontal rows - elements have the same number of electron shells - Periods go from 1 to 7

5. Periods

6. Trend 2: Groups or Families Groups – vertical columns -Elements in the same group have similar chemical properties - Groups go from 1 to 18

7. Groups

8. Families Families: Some groups are combined as they all act similarly.

10. Hydrogen Family of one! Sometimes acts like a metal Sometimes acts like a non-metal

11. Alkali Metals Group 1 Most reactive metals Always combined with other substances in nature Ex: Li, Na, K

12. Alkaline Earth Metals Group 2 Very reactive metals Ex: Be, Mg, Ca

13. Transition Metals Groups 3-12 Most common metals Shiny High melting points Ex: Au, Ag, Cu, Co

14. Groups 13 to 16 You are not responsible for the names of these families.

15. Halogens Group 17 Most reactive non-metals Ex: F, Cl, Br

16. Noble gases Group 18 Very stable Not reactive under normal conditions Ex: He, Ne, Ar

17. Trend 3: Metals, Non-metals, Metalloids Staircase – separates metals and non- metals

18. Properties of Metals, Non- metals and Metalloids: LocationState (at room temperature) AppearanceConductivity (heat and electricity) Metals Left side of staircase Solids (except Hg – liquid) ShinyGood Non- metals Right side of staircase Some gases, some solids (except Br – liquid) Not very shiny Poor Metalloids Directly surrounding staircase SolidsEither shiny or dull May conduct electricity, poor for heat

19. Metal = green Non-metals = yellow Metalloids = blue Use your book or this slide to colour your own periodic table for reference: