Unit 8 Notes: Covalent Bonding

Open Ended

Describe the difference between an Ionic Bond and a Covalent Bond.

Multiple Choice

BrO₃

• bromine oxide
• monobromine trioxide
• bromine trioxide
• bromine (III) oxide

Multiple Choice

As₄O₁₀

• arsenic oxide
• quadarsenic decoxide
• tetraarsenic decoxide
• arsenic decoxide

Multiple Choice

Why is it important for scientists to use prefixes when naming covalent compounds?

• To indicate the number of atoms of each element in the compound

• To make the names sound more scientific

• To show the physical state of the compound

• To identify the color of the compound

Open Ended

Explain the steps involved in drawing a Lewis structure for a covalent compound. Why is the octet rule important in this process?

Multiple Choice

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

Multiple Choice

Which of the following statements about octet exceptions is correct?

• Second row elements like C, N, O, and F can have expanded octets.

• Boron and beryllium often have incomplete octets and are very reactive.

• Third row elements never have more than eight electrons.

• All elements must always obey the octet rule.

Multiple Choice

Which of the following bonds is considered a polar covalent bond?

• C-H bond (Electronegativity difference = 0.35)

• H-F bond (Electronegativity difference = 1.80)

• Na-F bond (Electronegativity difference = 3.07)

• Cl-Cl bond (Electronegativity difference = 0)

Multiple Choice

The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table.
Which element has the highest electronegativity?

• W
• X
• Y
• Z

Multiple Choice

Based on electronegativity trends in the periodic table, which of the following is the most likely value for the electronegativity of silicon?

• 2.44
• 1.23
• 2.22
• 2.03