1. Chem I Block- 4.14.15 Objectives:
I can graph and interpret periodic trends.
I can apply Lewis Dot Structures to chemical bonding.

2. Bell Ringer: Chemistry
Predict the charge each element will have to reach chemical stability.
Al b. Br c. Ne
a. Which element above is classified as an anion when it is stable. Explain.
b. Which element above is classified as a cation when it is stable. Explain

3. Periodic Properties and Trends
Atomic Radius:
-Size of an atom.
-The distance from the nucleus to the outermost energy level in picometers, pm. (1pm = 1x10-12 m)
Ionization Energy:
-The amount of energy needed to remove a valence electron from an atom.
-The amount of energy needed to overcome the attractive force the ve- has with protons in the nucleus.
-Energy required for an atom to become a cation, more stable.
Electronegativity:
-The degree of attraction one atom’s protons has toward another atom’s ve-.
-Determines the type of bond between the atoms, ionic or covalent.

4. Periodic Trends: Atomic Radius
Across a Period
Down a Group

5. Periodic Trends: Atomic Radius
Across a Period
Decreases
Down a Group
Increases

6. Periodic Table : Atomic Radius

7. Periodic Trends: Ionization Energy
Across a Period:
Down a Group:

8. Periodic Trends: Ionization Energy
Across a Period:
Increases
Down a Group:
Decreases

9. Periodic Trend: Electronegativity
Across a Period:
Down a Group:
mmsphyschem.com

10. Periodic Trend: Electronegativity
Across a Period:
Increases except
noble gases.
Down a Group:
Decreases except for noble gases.
mmsphyschem.com

11. Electronegativity and Chemical Bonding
Do metals or non-metals have a greater electronegativity value?

12. Exit Slip
1. Use your atomic radius graph to rank the following elements in increasing atomic radius. Cl, Mg, Al, Na 2. Use your ionization energy graph to rank the following elements in decreasing ionization energy. Ba, Mg, Ca, Be

13. Chemistry 1/15/14
Objectives:
I can interpret Periodic Trend Graphs.
I can predict the charge an element will have for chemical stability.
I can predict the size of an ion.
Homework:
Review notes; periodic trend worksheet, quiz tomorrow.

14. Chemistry 1/16/14
Due:
Periodic Table Enrichment/Chemical Stability wksht.
from gallery walk.
Objectives:
Quiz over Periodic Trends and Chemical Stability
I can predict the size of an ion.
I can illustrate ve- using Lewis Dot Structures.
I can interpret Periodic Trend Graphs.
I can predict the charge an element will have for chemical stability.
Homework:
Lewis Dot Structure Worksheet

15. Size of an Ion
Use the diagrams below to determine what happens to the size of a neutral atom(parent atom) when it becomes an ion.

16. Size of a Cation
Why is the cation smaller than its parent atom (neutral)?

17. Size of a Cation A cation is smaller than its parent atom.
Why? Because metals will lose an energy level in the process
of becoming a cation.

18. Size of an Anion
Why is an anion larger than its parent atom?

19. Size of an Anion A anion is larger than its parent isotope.
Why? Repulsion force increases as more electrons are
added to the outer most energy level. Swells the energy level.

20. Size of Ions Circle the atom that is larger in size. Ca or Ca2+
S or S2-
Circle the atom that is smaller in size.
a. Al or Al3+
b. N or N 3-

21. Chemical Stability Review
Octet Rule:
Atoms will gain, lose, or share valence electrons to reach stability.
The need for stability produces compounds (ionic and covalent)

22. Chemical Stability Review
1. Determine what charge, if any, each element below would need to be chemically stable. a. Se b. K c. O d. Kr e. Fe 2. Circle the elements below that has the correct charge for chemical stability. a. N5- b. Ca2+ c. Cu2- d. Cl1- e. Xe8+

23. Octet Rule Revised:
Atoms will gain, lose, or share valence electrons to reach stability.
The need for stability produces compounds (ionic and covalent)

24. Chemistry 1/24/14 Due: Lewis Dot Structures Worksheet Objectives:
Review Periodic Table and Chemical Stability Concepts
Address Chemical Stability Quiz
Use Lewis Dot Structures to illustrate Ionic Bonding
Homework:
Periodic Table Study Guide-Test Wednesday! (Chpt. 6)
Lewis Dot structures for ionic bonding.

25. Chemical Stability-Study Guide
13. Reviewed chemical stability table from study guide

26. Chemistry 1/28/14
Due:
Ionic Bonding Lab (Lewis Dot Transfer Illustrations)
Objectives:
Use Lewis Dot Structures to illustrate Ionic Bonding
Review for Periodic Table Exam
Homework:
Periodic Table Study Guide-Due Wednesday
Periodic Table Exam-Wednesday (review notes, quizzes)

27. Periodic Trends: Review
Atomic Radius: decreases
Ionization Energy:increase
*Electronegativity: increase
Atomic Radius: increases
Ionization Energy: decrease
*Electronegativity: decrease

28. Lewis Dot Structures
Purpose: To illustrate valence electrons

29. Periodic Table Study Guide
*Review notes, quizzes, labs, etc. *Chpt. 6 in Chemistry Textbook

30. Chemistry 1/29/14
Due:
Ionic Bonding Lab (Lewis Dot Transfer Illustrations)
Objectives:
Periodic Table Unit Exam
Homework:
Naming Ionic Compounds

31. Naming Ionic Compounds
Define and give an example of a monatomic and polyatomic ions (Chpt. 9.1 in text)
-Monatomic ions
-Polyatomic ions
b. Using flow chart: try to name compounds from Ionic Bonding Lab. (write answers on back of sheet.)