Covalent Bonding Two Day Lesson

Identify the properties of covalent bonds Objective Today I will be able to: Identify the properties of covalent bonds Correctly name and write formulas for covalent compounds Evaluation/ Assessment Informal assessment – Listening to group interactions and student questions as they complete the webquest and covalent compound practice Formal Assessment – Analyzing student responses to the exit ticket, webquest and covalent compounds practice Common Core Connection Build Strong Content Knowledge Look for and make use of structure

Lesson Sequence Evaluate: Warm – Up (Day 1 and 2) Explain: Covalent Bonding Notes (Day 1) Engage/Explore/ Elaborate: Activity 1 or Activity 2 (Day 1 and 2) 1= Webquest 2 = Naming/ Formula Writing Practice Elaborate: Ionic and Covalent Naming/Writing Practice (Day 2) Evaluate: Exit Ticket (Day 1 and 2)

Warm Up – Day 1 When are roman numerals used in naming ionic compounds? Try these problems without your pink sheet! Write the ionic formulas and formula name for the following sets of ions: K+ Br – Fe2+ Cl – Ba2+ SO42- NH4+ CO32-

Warm Up – Day 2 How could you differentiate between an ionic and covalent compound in a lab? What is a covalent compound composed of? What is an ionic compound composed of? Name the following covalent compounds: SO2 CO N2O5 Take a look at your exam. If you have questions please ask Ms. Ose

Objective Today I will be able to: Identify the properties of covalent bonds Correctly name and write formulas for covalent compounds

Homework Finish Webquest OR naming practice Depending on the activity you completed today Study for Polyatomic Ions Quiz Be prepared Wednesday – Friday this week! Wear closed toe shoes Thursday STEM Fair Abstract Due Monday December 12

Agenda Warm – Up (Day 1 and 2) Covalent Bonding Notes (Day 1) Activity 1 or Activity 2 (Day 1 and 2) 1= Webquest 2 = Naming/ Formula Writing Practice Ionic and Covalent Naming Practice (Day 2) Exit Ticket (Day 1 and 2)

Covalent Bonds: Naming and Properties

Covalent Bonds Formed by sharing of electrons between atoms Typically between two or more nonmetals Ex. CH4

Covalent Bond Properties Low melting and boiling point Poor conductors Not malleable or ductile

Covalent Bonds Electrons are not always shared equally Two types of covalent bonds Polar Nonpolar

Polar Covalent Bonds When one atom is more electronegative than another, the shared electrons spend more time around it Example: H2O

Nonpolar Covalent Bonds Electrons are shared equally Both atoms have similar electronegativities Example N2

Electronegativity Differences between Bonds Type of Bond 0.5 or less Nonpolar Covalent 0.6 – 1.8 Polar Covalent 1.9 or greater Ionic

Naming Covalent Compounds Notes

Remember the prefixes???? Prefix Number Mono - 1 Di - 2 Tri - 3 Tetra - 4 Penta - 5 Hexa - 6 Hepta - 7 Octa 8 Nona- 9 Deca - 10

Naming covalent compounds For the first element, use the full name of the nonmetal with a prefix denoting how many atoms of that element If there is only one do not use the prefix For the second element change the ending to the suffix –ide, use a prefix to denote how many atoms that are present Examples SO2 – Sulfur dioxide P2O5 Diphosphorus pentoxide PCl3 – Phosphorus trichloride

Covalent Compounds Activities Listen to Ms. Ose’s directions. You will complete the following activities over the next two classes. One activity will be completed in class today and the other will be completed tomorrow. Ms. Ose will divide the class in half.

Covalent Compounds Activities Webquest Use the computer to complete the webquest No more than 3 people per computer Ask Ms. Ose for help if you have questions Covalent Naming Practice Mol Monday # 1 (on Tuesday) Complete the practice at your desk Ask Ms. Ose for help if you have question Both activities will be collected!

Mol Monday # 1 How many grams of phosphorous pentachloride are in 7.28 x 1026 molecules?

Ionic and Covalent Naming Practice Complete the practice at your desk. Ask questions if you need help!

Ionic and Covalent Naming Practice Review Trade papers with a partner nearby and check their answers!

Exit Ticket – Day 2 Determine if the compound is ionic or covalent. Then name the compound. CO Al2O3 PCl5 BeO