C8 Molecules in Action Quiz

If a compound has molecules that are nonpolar, its molecules

• are not attracted to a charged object.

• carry partial charges.

• are strongly attracted to one another.

• tend to dissolve easily in water.

Why are diatomic molecules of elements, such as H₂, Cl₂, and N₂, always nonpolar?

• Polar molecules have at least three atoms.

• Both atoms are exactly the same size.

• The molecules contain no lone pairs.

• The two atoms have the same electronegativity.

Based on the difference in electronegativity, how is the H–Cl bond of hydrogen chloride classified?

• nonpolar

• somewhat polar

• very polar

• ionic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of bond forms between two atoms if the difference between their electronegativities is equal to 3.00?

• nonpolar

• somewhat polar

• very polar

• ionic

Which of these elements has the greatest electronegativity?

• oxygen

• silicon

• barium

• lithium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these molecules is polar?

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• 
• 
• 

Based on the size and polarity of the molecules, for which pair of compounds below do both compounds have a smell?

• CH₄ and NH₃

• CH₄ and C₁₀H₁₈O

• NH₃ and C₁₀H₁₈O

• H₂S and C₄₆H₉₂O₂

Why are molecules of carbon dioxide nonpolar?

• Carbon and oxygen have the same electronegativity.

• The two dipoles balance one another.

• Oxygen atoms have more electrons than carbon atoms.

• The two oxygen atoms form a nonpolar bond with one another.

Which of these substances would be predicted to smell based on the size and polarity of its molecules but does not have any smell?

• copper

• salt

• water

• polystyrene foam

In a polar covalent bond, the electrons

• are shared equally.

• are shared unequally.

• are transferred.

• form lone pairs.