Unit 4 Covalent Bonds Honors

Multiple Choice

What two types of atoms make a covalent bond?

• 2 Nonmetals
• 1 Nonmetal and 1 Metal
• 2 Metals
• 2 Noble Gases

Multiple Choice

Which of the following best describes a covalent compound?

• A compound formed when two or more atoms share electrons

• A compound formed when atoms transfer electrons

• A compound formed only between metals

• A compound that conducts electricity in solid state

Multiple Choice

Which of the following is an example of a covalent compound?

• NaCl (table salt)

• H2O (water)

• KCl (potassium chloride)

• CaCl2 (calcium chloride)

Open Ended

What are diatomic elements and give two examples?

Multiple Select

Select all molecules that follow the octet rule.

• H2O

• O2

• CO2

• N2

Open Ended

Explain why electron pairs tend to be as far apart from one another as possible according to VSEPR theory.

Open Ended

Explain the concept of resonance.

Multiple Choice

Which of the following molecules cannot be represented by a single Lewis structure?

• HF

• CCl4

• O3

• SiO2

Multiple Select

Which of the following are polyatomic ions?

• NH4+

• SO4^2-

• HF

• O3

Multiple Choice

What is the charge on the sulfate ion (SO4) as shown in the polyatomic ions example?

• 1+

• 2+

• 1-

• 2-

Open Ended

Describe the steps to name a covalent compound given its chemical formula.

Multiple Choice

Which of the following is the correct name for the compound with the formula SF6?

• Sulfur hexafluoride

• Sulfur pentafluoride

• Sulfur hexoxide

• Sulfur tetrafluoride

Open Ended

Explain how prefixes are used to determine the subscripts in the chemical formula of a covalent compound. Why is it important not to simplify the formula?

Multiple Choice

Which of the following compounds contains three nitrogen atoms?

• Pentaphosphorus trinitride

• Dicarbon tetroxide

• Sulfur pentoxide

• Silicon tetrafluoride

Multiple Select

Select all the correct rules for naming acids from the following:

• For binary acids, use 'hydro' + base name of the anion + -ic ending + acid

• For oxyacids with -ite ending, use base name of the anion + -ous ending + acid

• For oxyacids with -ate ending, use base name of the anion + -ic ending + acid

• For binary acids, use 'per' + base name of the anion + -ic ending + acid

Open Ended

How do covalent compounds differ from ionic compounds in terms of what happens with electrons ?

Multiple Choice

What is the main difference between a polar covalent bond and a pure (nonpolar) covalent bond?

• Polar covalent bonds share electrons equally, while pure covalent bonds share electrons unequally.

• Polar covalent bonds share electrons unequally, while pure covalent bonds share electrons equally.

• Both types of bonds share electrons equally.

• Pure covalent bonds do not share electrons at all.

Open Ended

Explain the process of naming a covalent compound and provide an example.

Multiple Choice

What is the main difference between naming acids and naming covalent compounds?

• Acids use hydrogen as the first element, covalent compounds do not.

• Covalent compounds use prefixes to indicate the number of atoms, acids do not.

• Acids are named based on their anion, covalent compounds are named based on the elements present.

• All of the above