1. CHEMISTRY December 2, 2014 PERIODS and GROUPS

2. SCIENCE STARTER You are seated and silent Do the Science Starter You have 3 minutes

3. PERIODS HORIZONTAL ROWS ON THE PERIODIC TABLE – There are 7 periods Period 6 includes lanthanides Period 7 includes actinides

4. PERIODS PeriodsNo. of ElementsNo. of energy levels 1 2 3 4 5 6 7

5. GROUPS VERTICAL COLUMNS ON THE PERIODIC TABLE – There are 18 Groups Group 1 hydrogen (only H) Group 1 alkali metals (all but H) Group 2 alkaline earth metal Group 3-12 (collectively) transition metals Group 13boron Group 14carbon Group 15nitrogen Group 16 chalcogens Group 17 halogens Group 18 Noble gases

6. VALENCE ELECTRONS THE ELECTRONS IN THE OUTERMOST SHELL THE LAST NUMBER IN THE ELECTRON CONFIGURATION

7. VALENCE ELECTRON EXAMPLE LITHIUM – WHAT IS THE ELECTRON CONFIGURATION? – HOW MANY ELECTRON SHELLS? – HOW MANY ELECTRONS IN THE LAST SHELL? SODIUM – WHAT IS THE ELECTRON CONFIGURATION? – HOW MANY ELECTRON SHELLS? – HOW MANY ELECTRONS IN THE LAST SHELL?

8. WHAT IS THE PATTERN? WHAT IS THE VALENCE ELECTRON PATTERN FOR EACH GROUP?

9. THE VALENCE ELECTRON PATTERN NUMBER OF VALENCE ELECTRONS ARE THE SAME FOR EACH GROUP (DO NOT INCLUDE TRANSITION GROUPS)

10. GROUPS GroupsGroup NameNo. of Valence Electrons 1Hydrogen Group (H only) 1Alkali Metal Group (all but H) 2Alkali Earth Metal Group 13Boron Group 14Carbon Group 15Nitrogen Group 16Chalcogen Group 17Halogen Group 18Noble Gas Group

11. ELEMENTS ElementPeriodGroup Atomic Number Group Name Electron Configuration No. of Valence Electrons Li H B P

12. ELEMENTS ElementPeriodGroup Atomic Number Group Name Electron Configuration No. of Valence Electrons Se Cl Kr Cs

13. ELEMENTS ElementPeriodGroup Atomic Number Group Name Electron Configuration No. of Valence Electrons He Mg As Na

14. ELEMENTS ElementPeriodGroup Atomic Number Group Name Electron Configuration No. of Valence Electrons Ba N Si O Br

15. AIM Using R.A.C.E, respond to the following AIM prompt: What are the relationships between Na (sodium) and Ar (argon)?