1. Catalyst – February 30-4, 2013 HW OUT PLEASE!
Using the PT, choose and record an element from each of the following groups:
Alkali Metals
Transition Metals
Noble Gases
Anctinides
Metalloids
Halogens

2. Our Periodic Table – Thanks to Mosely

3. Today’s Agenda (FYI: Quizzes back tomorrow)
Catalyst
HW Questions?
Notes: Periodic Trends
PT Trends Work CUZ WE RIDIN NERDY!
Project Work Time
Exit Question, Lab Fees, and Progress Reports!
HOMEWORK:
PERIODIC TRENDS WORKSHEET

4. Periodic Table Project
Will choose an element from the list provided
No one can have the same element!
Part 1: Element Card for the wall (25 Points)
Part 2: Element Facebook Page (75 Points)
Cool Source! YouTube Periodic “Table of Videos”

5. HAPPY NERD DAY!!!!
HW Questions???

6. Today’s Objectives SWBAT define periodicity.
SWBAT describe the periodic trends for valence electrons, atomic radius, and electronegativity.

8. PERIODICITY AND PERIODIC TRENDS
NOTES TITLE:
PERIODICITY AND PERIODIC TRENDS

9. CHEMISTRY & YOU
How are trends in the weather similar to trends in the properties of elements?
Although the weather changes from day to day, the weather you experience is related to your location on the globe.
Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. .

10. Periodicity is…
Key Point #1: Periodicity is the quality or state of being regularly recurrent or having periods.

11. Periodic Trends
Key Point 2: The trends and patterns on the periodic table help us both compare and contrast elements.

12. Note-Taking Strategy Use the chart in your notes – like this….
Vocab Word Periodic Trend

13. Nab that Vocab!
Copy your definitions from yesterday into the table in your notes! Repeated writing may help you remember the definitions!
Valence electrons: ???
Atomic radius: ???
Electronegativity: ???

14. Note-Taking Strategy To be filled in! To be filled in!
Use the chart in your notes – like this….
Vocab Word Periodic Trend
Valence electrons: ???
To be filled in!
Atomic radius: ???
To be filled in!
Electronegativity: ???
To be filled in!

15. Note-Taking Strategy To be filled in! To be filled in!
Use the chart in your notes – like this….
Vocab Word Periodic Trend
Valence electrons: electrons in the outermost (or outside/biggest) energy level
To be filled in!
Atomic radius: ???
To be filled in!
Electronegativity: ???
To be filled in!

16. Note-Taking Strategy To be filled in! To be filled in!
Use the chart in your notes – like this….
Vocab Word Periodic Trend
Valence electrons: electrons in the outermost (or outside/biggest) energy level
To be filled in!
Atomic radius: how big an atom is, also known as atomic size
To be filled in!
Electronegativity: ???
To be filled in!

17. Note-Taking Strategy To be filled in! To be filled in!
Use the chart in your notes – like this….
Vocab Word Periodic Trend
Valence electrons: electrons in the outermost (or outside/biggest) energy level
To be filled in!
Atomic radius: how big an atom is, also known as atomic size
To be filled in!
Electronegativity: the ability of an atom to attract electrons to itself in a chemical bond; how much an atom wants electrons
To be filled in!

18. LOOK OUT! VALENCE ELECTRONS TREND

19. Let’s look at Bohr Models…

20. TREND: Valence Electrons
# of valence electrons increases from 1-8 as you go left to right (#A on top of PT)
>8

21. Valence Electrons Write on your PT

22. LOOK OUT! ATOMIC RADIUS TREND

24. Ranked Small to Large: Na, K, Rb, Cs

25. LOOK OUT! ELECTRONEGATIVITY TREND

26. Ranked Small to Large: Ga, Ge, As, Se

27. Electronegativity Values for Selected Elements in PaulingsH
2.1 Li
1.0 Be
1.5 B
2.0 C
2.5 N
3.0 O
3.5 F
4.0 Na
0.9 Mg
1.2 Al Si
1.8 P S Cl K
0.8 Ca Ga
1.6 Ge As Se
2.4 Br
2.8 Rb Sr In
1.7 Sn Sb
1.9 Te I Cs
0.7 Ba Tl Pb Bi

28. the Relationship Between
Using Graphs to
Understand
the Relationship Between
Atomic Radius and
Electronegativity

29. GROUP 1 H + Alkali Metals

30. PERIOD 1 Li - Ne

31. Why is this relationship true?
vs.
LARGE EN =
SMALL AR
LARGE AR =
SMALL EN

32. Work Time
Complete worksheet from Ms. Stroh 
Help each other and ask questions when you’re all stumped!
When you finish, you may work on your Periodic Table Project 

33. PERIODIC TRENDS WORKSHEET
Exit Question
State the left to right trend for valence electrons.
Which element has the largest atomic radius: Ag, Cu, Hg, or Zn?
Which element has the largest electronegativity: Ag, Cu, Hg, or Zn?
HOMEWORK:
PERIODIC TRENDS WORKSHEET