1. The Periodic Table

2. Organization Horizontal rows are called periods. - Each element in a period is in a different family or group.

3. Horizontal Rows

4. Organization Vertical columns are called families or groups. - Elements within a family can have many similar properties. - Their properties are similar because their atoms have a similar arrangement of electrons.

5. Vertical Columns

6. Metals Most of the elements are metals. They occupy the space to the left of the zigzag line.

7. Group 1

8. Group 2

11. Groups 3-12

12. Border the Zigzag Line Other Metals

13. Metalloids Elements that have properties of both metals and non-metals. Also known as semi-metals. Border both sides of the zigzag line.

14. Border the Zigzag Line Metalloids

15. Non-metals Occupy the upper-right corner of the Periodic Table. All non-metals, except Hydrogen are to the right of the zigzag line.

16. Non-metals

17. Group 17 – Salt Producing

18. Group 18 Outer Electron Shell is Full

19. 13 Al Aluminum 27 Atomic Number Symbol (always PRINTED) Element Name Atomic Mass (sometimes a decimal) How to Read Each Box

20. Atomic Number = Protons = Electrons For Aluminum, there are 13 protons For Aluminum, there are 13 electrons Number of Protons, Electrons & Neutrons Atomic Mass # – Atomic # = Neutrons For Aluminum, there are: 27 – 13 = 14 neutrons 27 – 13 = 14 neutrons