Two Day Lesson



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



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)


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-
–




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

Today I will be able to:
◦ Identify the properties of covalent bonds
◦ Correctly name and write formulas for covalent
compounds

Finish Webquest OR naming practice
◦ Depending on the activity you completed today



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)


Formed by sharing of electrons between
atoms
Typically between two or more nonmetals
◦ Ex. CH4



Low melting and boiling point
Poor conductors
Not malleable or ductile

Electrons are not always shared equally
Two types of covalent bonds
Polar
Nonpolar


When one atom is more electronegative than
another, the shared electrons spend more
time around it
Example: H2O



Electrons are shared equally
Both atoms have similar electronegativities
Example
◦ N2
Electronegativity
Difference
0.5 or less
Type of Bond
0.6 – 1.8
Nonpolar
Covalent
Polar Covalent
1.9 or greater
Ionic
Prefix
Number
Mono -
1
Di -
2
Tri -
3
Tetra -
4
Penta -
5
Hexa -
6
Hepta -
7
Octa
8
Nona-
9
Deca -
10

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
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.

Webquest
◦ Use the computer to
complete the webquest
◦ No more than 3 people
per computer
◦ Ask Ms. Ose for help if
you have questions
Both activities will be
collected!


Covalent Naming
Practice
Mol Monday # 1 (on
Tuesday)
◦ Complete the practice at
your desk
◦ Ask Ms. Ose for help if
you have question
◦ How many grams of phosphorous pentachloride are
in 7.28 x 1026 molecules?
Complete the practice at your desk. Ask
questions if you need help!
Trade papers with a partner nearby and check
their answers!

Determine if the compound is ionic or
covalent. Then name the compound.
◦
◦
◦
◦
CO
Al2O3
PCl5
BeO