Monday, February 9 th, 2014 HW: Agenda Questions/Simulation Objective 6: We will create Lewis dot structures for covalent compounds. Catalyst: Name the following: a.) CCl 4 b.) MgO c.) N 2 O Classroom expectations: 1.Wear Kenwood ID. 2.Cell phones, music players, and headphones are put away. 3.Food is disposed of or put away. 4.Dressed appropriately. 5.Notebook is out and you are ready for today’s class. 2/9Week 22 Catalyst(*draw in NB)114 2/9Week 22 Agenda (*online)115 2/9Drawing Covalent Compounds116 2/9Molecular Geometry (VSEPR)117 ***Table of Contents

Announcements Tutoring today. Simulation/Agenda Questions due Friday!!! (Turn this in early!!!) Quiz tomorrow over covalent/ionic properties (study both sides of pg 109!) and naming (study 112 and 113!)

Agenda Catalyst/Announcements Notes on how to draw covalent compounds. Practice drawing covalent compounds.

Homework Check 7.) Ionicv. Covalent High melting ptLow melting ptnot malleable conducts electricitydoes not conduct in waterelectricity in water

Homework Check 8) a. H 2 O b. PH 3 c. CCl 4 d. CO 2

Homework Check 8)e. Cl 2 O 7 f. Si 2 Br 6 g. NO 3 h. P 3 O 5

Homework Check 9)a. dinitrogen pentoxide b. carbon tetrahydride c. nitrogen dioxide d. hexacarbon hexahydride

Homework Check 9)e. selenium hexabromide f. boron trifluoride g. carbon monoxide h. bromine trioxide

Review What’s wrong with this picture?

Review. How would you draw a Lewis dot structure for NaCl?

Review. Why do we put brackets around the chlorine atom in NaCl?

Review. How are covalent bonds different from ionic bonds?

CO 2 Carbon dioxide is the gas that we exhale out of our bodies each and everyday. Although it is invisible to our eyes, it does have a distinct structure. So what does CO 2 look like anyway???

Steps for Drawing Covalent Compounds StepsExample 1.) Determine the total number of valence electrons ALL of the atoms have. CO 2 = C + O + O CO 2 has 16 e -

Steps for Drawing Covalent Compounds StepsExample 2.) Determine the total number of valence electrons ALL of the atoms want. CO 2 = C + O + O CO 2 wants 24 e -

Steps for Drawing Covalent Compounds StepsExample 3.) Calculate the number of electrons the compound will share. Equation: wants – has = shared 8 e - will be shared in CO 2 24 – 16 = 8

Steps for Drawing Covalent Compounds StepsExample 4.) Determine the central atom. Single atom Carbon Least Electronegative atom C

Steps for Drawing Covalent Compounds StepsExample 5.) Put the central atom in the middle and write the other atoms around. O C O

Steps for Drawing Covalent Compounds StepsExample 6.) Draw a single bond between the central atom and the outer atoms. O C O

Steps for Drawing Covalent Compounds StepsExample 7.) Check your structure to make sure enough electrons are being shared. If not, draw in more bonds. CO 2 shares 8 e - O C O

Steps for Drawing Covalent Compounds StepsExample 8.) Fill in the non-bonding electrons on the outside atoms to fulfill the octet rule. (Remember: Hydrogen only needs 2 electrons!) CO 2 has 16 e - O C O

Steps for Drawing Covalent Compounds StepsExample DISCUSS: Do all of the atoms have the number of electrons that they want??? CO 2 has 16 e - O C O

Additional Examples Trioxide – also called Ozone (O 3 ) Cyanide (CN - )

Practice Work with your elbow partner to answer practice problems 1-12.

Tuesday, February 10 th, 2015 HW: Agenda Questions/Simulation Objective 6: We will create Lewis dot structures for covalent compounds. Catalyst: Open your notebooks to page 116 and complete problems 1-6 on the second page. Classroom expectations: 1.Wear Kenwood ID. 2.Cell phones, music players, and headphones are put away. 3.Food is disposed of or put away. 4.Dressed appropriately. 5.Notebook is out and you are ready for today’s class. 2/10Nonpolar, Polar, and Ionic Bonds118 ***Table of Contents

Wednesday, February 11 th, 2015 HW: Agenda Questions/Simulation Objective 6: We will create Lewis dot structures for covalent compounds. Catalyst: Open your notebooks to page 116 and next to all of your Lewis dot structures: a.) Write nonpolar or polar. b.) Write the name of the geometry they would form. Classroom expectations: 1.Wear Kenwood ID. 2.Cell phones, music players, and headphones are put away. 3.Food is disposed of or put away. 4.Dressed appropriately. 5.Notebook is out and you are ready for today’s class. 2/10Nonpolar, Polar, and Ionic Bonds118 ***Table of Contents

Announcements No Tutoring Today Simulation/Agenda Questions due Friday!!! (Turn this in early!!!) Quiz pushed back to tomorrow over covalent/ionic properties (study both sides of pg 109!) and naming (study 112 and 113!)

Agenda Catalyst/Announcements Practice drawing covalent compounds. Molecular Geometries Polarity

Nonpolar Covalent, Polar Covalent, and Ionic Bonds 118

DEMO Why doesn’t oil and water mix?

DEMO Water is a POLAR molecule. Oil is a NONPOLAR molecule.

Observe Open your notebooks to page 117. Observe. What are some differences you notice between polar and nonpolar molecules?

Observe Open your notebooks to page 117. Observe. What are some differences you notice between polar and nonpolar molecules?

Nonpolar Molecules Nonpolar molecules are symmetrical. They look the same on all sides.

Polar Molecules Polar molecules are asymmetrical. Both sides of a molecule are not mirror images of one another.

“Polar” A pole refers to 2 sides with a different charge. Example: earth’s magnetic field

“Polar” A pole refers to 2 sides with a different charge. Example: magnets

“Polar” A pole refers to 2 sides with a different charge. Example: polar molecules

Why don’t oil and water mix ? Water is polar. Therefor it has a charge. Other molecules with a charge will react with water and dissolve. Vegetable oil is nonpolar. It does not have a charge and does not react with water. Vegetable oilWater