1. CHEMISTRY PART 2 Periodic Table

2. Chemistry – Recall  Chemistry is the study of matter and the changes it undergoes  Physical Properties: cause a physical change (colour, density, melting point, boiling point, state of matter)  Chemical Properties: describes how one substance reacts with another  A chemical property can only be identified once a substance has undergone a chemical reaction  Chemical Reaction: where matter changes to produce new substance(s) with properties different from those original materials

3. Periodic Table  Atomic Number = # of protons  If the atom is neutral:  Atomic Number = # of electrons  Atomic Mass = # of protons + # of neutrons  # of neutrons = atomic mass - # of protons

4. Periodic Table  Elements are in order of increasing atomic mass.

5. Periodic Table  Periods:  Horizontal rows. (1 to 7)  Number of electron shells.

7. Periodic Table  Groups:  Vertical columns. (1 to 18)  Share characteristics and properties.  Same number of electrons in outer shell.

9. Periodic Table  Metals  Share specific properties.  Non-Metals  Share specific properties.  Metalloids  Have properties of both metals and non-metals.

11. Periodic Table  Alkali Metals  Group 1  Silver colored metals  Very reactive

12. Periodic Table  Alkaline Earth Metals  Group 2  Reactive

13. Periodic Table  Transition Metals  Groups 3 to 11  Have more than one charge

14. Periodic Table  Halogens  Group 17  Extremely reactive  Form strong acid compounds when bonded to H

15. Periodic Table  Nobel Gases  Group 18  Unreactive (for the most part)

16. Lanthanides  Outside periodic table  Period 6

17. Actanoids  Outside periodic table  Period 7

18. Synthetic elements  Elements from atomic #95 and above

19. Periodic Table  Hydrogen is an exception:  It can behave like an alkaline metal or a halogen.

20. Periodic Table  Elements of the Periodic Table Elements of the Periodic Table http://www.periodicvideos.com/videos/003.htm

21. Practice  Page 97 # 15, 18, 19