G10 Review on Covalent Bonding

G10 Review on Covalent Bonding

Unit 3 Session 2

Multiple Choice

TRUE or FALSE

Salt and sugar are both examples of ionic compounds.

• TRUE

• FALSE

Covalent Compounds

A covalent compound is usually composed of two or more nonmetal elements.

Multiple Select

Which of the following are properties of covalent compounds?

• low melting points and boiling points

• tend to be soft and relatively flexible

• they are good conductors of heat and electricity

• all soluble in water

Multiple Choice

Which of the following is NOT an example of a covalent compound?

• CO₃^2–

• CO

• CO₂

Multiple Select

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

• chlorine trifluoride

• phosphorus pentachloride

• dinitrogen pentoxide

• magnesium bromide

Rules for naming covalent compounds

• The first element in the formula is simply listed using the name of the element. The second element is named by taking the stem of the element name and adding the suffix -ide.

• A system of numerical prefixes is used to specify the number of atoms in a molecule.

• Normally, no prefix is added to the first element’s name if there is only one atom of the first element in a molecule. If the second element is oxygen, the trailing vowel is usually omitted from the end of a polysyllabic prefix but not a monosyllabic one (that is, we would say “monoxide” rather than “monooxide” and “trioxide” rather than “troxide”).

Multiple Choice

What is the correct chemical formula for dioxygen difluoride ?

• OF

• O₂F₂

• O₂F

• OF₂

Multiple Choice

What is the correct chemical formula for sulfur hexafluoride?

• SF₆

• S₆F₆

• S₆F

• SF