Name: ______Period: ______

Polarity & Electronegativity Worksheet

1.  What are the two ways you can determine what type of bond a compound contains.

2.  How does a polar bond differ from a nonpolar bond?

3.  Complete the table by predicting the type of bond that will form between the following elements only using the periodic table.

Elements / Bond Type- Ionic or Covalent?
Beryllium and Flourine
Selenium and Chlorine
Strontium and Sulfur
Potassium and Iodine
Sulfur and Iodine
Magnesium and Chlorine

4.  For each of the following molecules, determine if it is covalent, polar covalent, or ionic. Show your work by listing the electronegativities of each element in the bond.

Molecule / Electronegativity Values / Difference in Electronegativity / Bond Type? Ionic, Polar Covalent, Nonpolar Covalent?
H – Cl / H:
Cl:
H – H / H:
H:
Cl - Cl / Cl:
Cl:
C – O / C:
O:
Ca – O / Ca:
O:
Al – Fe / Al:
Fe:

5.  Complete the following table. Provide 3 examples of each bond type with different pairs of elements.

Nonpolar covalent / Polar covalent / Ionic
Example:
Krypton and Bromine
3.0 2.8 / Example:
Hydrogen and Oxygen
2.1 3.5 / Example:
Barium and Chlorine
.9 3.0

6.  In metallic bonding, explain what is meant by “sea of electrons”.

7.  Explain the unique properties that metals have because of metallic bonding.