2. Tuesday, December 6 Objective: Students will be interpret periodic trends. Bell Ringer: Please write an electron configuration of Aluminum, Al. You can use the diagram below for help.

3. 4 MINUTES REMAINING…

4. Tuesday, December 6 Objective: Students will be interpret periodic trends. Bell Ringer: Please write an electron configuration of Aluminum, Al. You can use the diagram below for help.

5. 3 MINUTES REMAINING…

6. Tuesday, December 6 Objective: Students will be interpret periodic trends. Bell Ringer: Please write an electron configuration of Aluminum, Al. You can use the diagram below for help.

7. 2 MINUTES REMAINING…

8. Tuesday, December 6 Objective: Students will be interpret periodic trends. Bell Ringer: Please write an electron configuration of Aluminum, Al. You can use the diagram below for help.

9. 30 seconds Remaining…

10. Tuesday, December 6 Objective: Students will be interpret periodic trends. Bell Ringer: Please write an electron configuration of Aluminum, Al. You can use the diagram below for help.

11. 10 Seconds Remaining…

12. TURN IN YOUR BELLRINGER!

13. December 6, 2011 AGENDA: 1 – Bell Ringer and Participation Log 2 – Review Quiz 3 – Notes 4 – Periodic Trends Assignement Today’s Goal: Students will be able to interpret periodic trends.  Homework 1. SCIENCE FAIR!!! 2. Periodic Trends Assignment 3. Make up Quiz today after school.

14. Tuesday, December 6 CHAMPS! C – Conversation H – Help A – Activity M – Materials and Movement P – Participation S – Success!!!

15. Friday, December 2 Objective: Students will be able to earn 80% mastery on a weekly quiz. Bell Ringer: Evaluate in the table which subatomic particle determines each of the following (hint: use your foldable): ATOMISOTOPEION PROTONNEUTRONELECTRON

16. Periodic Trends Ms. Barkume 12/6 Periodic Trends aka Periodicity Reminder = Describe how atomic radius changes on the PT. Example On the periodic table Columns = groups/families Rows = periods Atomic radius = a measure of the size of an atom Increases down a group because number of energy levels increases. Decreases across a period because the positive charge of the nucleus increases, pulling the negative electrons closer to nucleus making the atom smaller. Cs is bigger than Na = in a group/family Na is bigger than F = in a period

17. Periodic Trends Ms. Barkume 12/6 Periodic Trends aka Periodicity Summarize how Ionization Energy changes acorss the PT. Example Ionization Energy = the energy required to remove an electron from the valence shell. (A measure of whether the atom will form a (+) cation.) I.E. decreases down a family because atom gets bigger, so it is easier to remove an outer electron I.E. increases across a period because the more (+) nucleus pulls on the electron more (also, think that atoms want to have 8 valence e -, therefore atoms with 7 valence e - probably won’t give an electron up. Fluorine has the highest ionization energy.

18. Periodic Trends Ms. Barkume 12/6 Periodic Trends aka Periodicity Explain Electronegativity. Example Electronegativity = the ability of an atom to attract an electron (A measure of whether an atom will form a neg. anion). Electronegativity decreases as you move down a group because the atom gets bigger so (+) nucleus is less likely to pull on the (-) electrons. Electronegativity increases as you move across a period because the greater (+) nucleus pulls more on electrons (also, think the closer atom is to having 8 valence e -, the higher electronegative. Fluorine is the most electronegative element.