1. Periodic Table Families & Identifying

2. Learning Scale – I can …
4 – Differentiate between the various groups on the periodic table.
3 - Describe the various groups on the periodic table.
2 - Use the periodic table to determine the number of protons, neutrons, or electrons.
1 - Identify patterns on the periodic table.

3. Development of the Periodic Table
In 1869, Dmitri Mendeleev noticed that patterns appeared when he arranged the elements in order of increasing atomic mass.
In 1913, Henry Moseley rearranged the periodic table according to atomic number.

4. Discussion
Why do you think that scientists changed how the periodic table was set-up?

5. Organization of the Table
Horizontal rows are called periods.
Vertical columns are called groups.
Atomic Mass= # of protons and neutrons
Atomic Number = # of protons (or # of electrons)

6. Characteristics of Metals
Luster (shiny)
Ductility (ability to be pulled into thin wires)
Malleability (ability to be hammered)
Conductor
Almost all are solid at room temperature

7. Characteristics of Nonmetals
Many are gases at room temperature.
Solids are brittle
No luster (dull)
Good insulators

8. Characteristics of Metalloids
Properties of both metals and nonmetals
Semiconductor – conducts electricity at high temperatures, but not at low temperatures.

9. Discussion
Compare and contrast metals and nonmetals.

10. Families on the Periodic Table
Elements on the periodic table can be grouped into families bases on their chemical properties.
Each family has a specific name to differentiate it from the other families in the periodic table.
Elements in each family
react differently with
other elements.

11. ALKALI METALS Group 1 Hydrogen is not a member Soft and silvery metals
Very reactive, esp. with water
Conduct electricity
1 Valence electron
Color this group color 1

12. ALKALINE EARTH METALS Group 2 White and malleable
Reactive, but less than Alkali metals
Conduct electricity
2 Valence electrons
Color this group color 2

13. TRANSITION METALS Groups in the middle (3-12)
Good conductors of heat and electricity.
Color this group color 3

14. BORON FAMILY Group 13 3 Valence electrons Most are metals
Color this group color 4

15. CARBON FAMILY Group 14 4 Valence electrons
Contains metals, metalloids, and a non-metal
Color this group color 5

16. NITROGEN FAMILY Group 15 5 Valence Electrons
Contains metals, metalloids, and non-metals
Color this group color 6

17. OXYGEN FAMILY Group 16 6 Valence electrons
Contains metals, metalloids, and non-metals
Reactive
Color this group color 7

18. Halogens Group 17 7 Valence electrons All are non-metals
Very reactive -react with metals to form salt
often bonds with Group 1
Color this group color 8

19. Noble Gases Group 18 Gases Non-metals
8 Valence electrons = Full (except He = 2)
Not reactive with other elements
Color this group color 9

20. Rare Earth Metals Lanthanides & Actinides Some are Radioactive
The rare earths are silver, silvery-white, or gray metals.
Conduct electricity
Color this group color 10
Rare Earth Metals

21. Discussion
What patterns can you identify on the periodic table? Provide evidence.

22. Learning Scale – I can …
4 – Differentiate between the various groups on the periodic table.
3 - Describe the various groups on the periodic table.
2 - Use the periodic table to determine the number of protons, neutrons, or electrons.
1 - Identify patterns on the periodic table.