2. The modern periodic table Elements arranged in order of increasing atomic number. Arranged in groups and periods.

4. Elements are arranged: Vertically into Groups Horizontally Into Periods

5. If you looked at one atom of every element in a group you would see…

6. Each atom has the same number of electrons in it’s outermost shell. An example…

7. Each atom has the same number of electrons in it’s outermost shell. Be (Beryllium) Atom Mg (Magnesium) Atom

8. If you looked at an atom from each element in a period you would see…

9. Each atom has the same number of electron holding shells. An example…

10. period 4 atoms each have 4 electron containing shells K (Potassium) Atom Fe (Iron) Atom Kr (Krypton) Atom 4 th Shell

11. Each group has distinct properties The periodic Table is divided into several groups based on the properties of different atoms.

12. Alkali Metals Soft, silvery colored metals, conduct electricity Very reactive!!! Especially with water

13. Alkaline Earth Metals Silvery-White Metals Malleable Fairly reactive Many are found in rocks in the earth’s crust Conduct electricity

14. Transition Metals Malleable (easily bent/hammered into wires or sheets) Most are good Conductors of electricity

15. Metalloids lie on either side of these “stairsteps” They share properties with both metals and non-metals Si (Silicon) and Ge (Germanium) are very important “semi-conductors”

16. Nonmetals Brittle Do not conduct electricity

17. Most are Poisonous Fairly reactive Fluorine is the most reactive element - It can combine with nearly any element on Earth. Halogens

18. Unreactive Gases at room temperature Noble Gases

19. Lanthanide Series Actinide Series

21. Things I need to know… Metals are solid, shiny malleable and ductile, and conduct electricity. Nonmetals are liquid or gas, dull, brittle, and do not conduct electricity. Metalloids are solid, dull, brittle, and are semiconductors.