Do Now After the bell (2 min) When the bell rings In your seat: Answer the following: A dad and his son were riding their bikes and crashed. Two ambulances came and took them to different hospitals. The man’s son was in the operating room and the doctor said, “I can’t operate on you. You’re my son.” How is that possible? In your seat: With pen/pencil With Notebook With Handout Packet from last class on your desk Silent and ready for Do Now Still needs Do Now The doctor is his mom!

Agenda  Do Now (5 min) Remediation Topic: Props of H2O Quiz (10 min) Warm Up (10 min) Notes: Covalent Bonding (30 min) Independent Practice (20 min) Exit Slip (5 min) Closeout (2 min)  Next Class

Properties of Water: You do Which two properties of water are demonstrated in the diagram to the left? Give a simple definition of cohesion.

Properties of Water: You do If water’s temperatures rose and fell at the same rate as the temperatures on land, marine life would be unable to exist. Which property of water is responsible for keeping the temperature of water relatively consistent? Polarity Universal Solvent Adhesion Specific Heat 3. A person fills a drinking glass with water until the water is bulging slightly over the glass rim. The property of water that prevents the water from spilling is _________________.

Forming and Naming covalent Compounds Objectives: Predict the formation of covalent compounds Using the nomenclature rules, name or predict formulas of compounds when given a covalent compound

Guiding Question How is a covalent compound different than an ionic compound?

Warm Up Which of the following is the formula for Copper (I) Selenide? Cu2Se CuSe2 Se2Cu SeCu2 What is the name of the compound PbO? Lead Oxide Lead (II) Oxide Lead (IV) Oxide Lead (III) Oxide

Warm Up When forming MgF2, magnesium and fluorine form ions that have the same electron configuration as what element? F Al Ne Ar What is the name of Li2O A student was given the formula BeF2 and named it Beryllium (II) Fluoride. Why is this answer wrong?

Covalent Bonds Definition: A bond between two non-metals; electrons are shared SO2

Identify each compound as ionic or covalent SO2 Al3O2 K2S O2 C6H12O6

Properties of Covalent Compounds Low Melting & Boiling Points Soft and brittle Does not dissolve in Water Does not conduct electricity If we could zoom in SUPER close

Writing Covalent Compounds Follow this format N2O5 Include on a right hand page in your notebook (Notes) Number of atoms of O The least electronegative, listed first The most electronegative, listed second Number of atoms of N

2 Type of covalent compounds Polar Non-polar Definition: Polar covalent bonding is a type of chemical bond where a pair of electrons is unequally shared between two atoms. Definition: Nonpolar covalent bonds are a type of chemical bond where two atoms equally share a pair of electrons with each other. 

Polar Molecules Molecules are polar bc…. Electrons are not shared equally One element is more electronegative Not symmetrical (asymmetrical) Partial charges Examples: H__ (ex. HCl, HF, HI) H2O NH3

Non-Polar Molecules Molecules are non-polar bc… Electrons are shared equally Diatomic molecules Symmetrical No permanent charges (because it is being equally pulled in all directions) Examples: X2 (ex. H2, Cl2, I2) CO2 C_4 (ex. CH4, CCl4, CI4)

C.F.U. H2 HF NH3 H2O NO2 Identify each of the following compounds as Polar or Non-Polar

The Octet Rule Covalent compounds still follow the Octet Rule They will settle for sharing electrons How many electrons do each of the following elements want to share? P Br N C Ne The Octet Rule

Making a Covalent Compound Example: H + Cl 3 Steps: Draw the Lewis Structure for each element Match the sides with single electrons Draw a line to connect the two single electrons H Cl Formula: HCl

Making a Covalent Compound You do: F + F C + F Making a Covalent Compound 3 Steps: Draw the Lewis Structure for each element Match the sides with single electrons Draw a line to connect the two single electrons F2 CF4

Types of bonds Single: one electron from each atom is shared (2 Total) Double: two electrons from each atom are shared (4 Total) Triple: three electrons from each atom are shared (6 Total)

C.F.U. 1. 3. Look at each diagram and determine how many electrons are shared in each compound 4. 2.

Rules for naming covalent compounds: The first element in the compound is named as it appears on the periodic table The second element is named with the root word + the suffix “ide” Prefixes are used to denote the numbers of each atom present exception: the prefix “mono” is never used with the first element

List of Prefixes Example 1: CO Example 2: CO2 Number of atoms: Prefix: mono 2 di 3 tri 4 tetra 5 penta 6 hexa 7 hepta 8 octa 9 nona 10 deca List of Prefixes Example 1: CO Example 2: CO2

Table Group Problems: Number of atoms: Prefix: 1 mono 2 di 3 tri 4 tetra 5 penta 6 hexa 7 hepta 8 octa 9 nona 10 deca N2O NO2 Dinitrogen Trioxide NO4 Phosphorous Pentachloride SO2

Table Group Answers: Dinitrogen Oxide Nitrogen dioxide N2O3 Dinitrogen Tetraoxide PCl5 Sulfur Dioxide

Activity: Independent Practice What? How? C – None H – Raise hand A – Writing electron configurations M – None P – Recoding answers on left page, head up, reading and thinking through all questions, discussing with group 15 minutes  Discuss for 5 minutes  Verify & Review

Exit Slip How? What? (5 min) C – No talking H – Raise hand A – Taking exit slip M – In seat P – Completing exit slip without notes and turning in If you finish early, summarize what you learned at the bottom of your notes OR answer today’s guiding question

Forgetting to stretch is a bear. Closing What are 3 key takeaways from today and yesterday? Complete the 8 Stretch questions