Simple Molecules and Extended Structures Quiz

What is the main difference between simple molecules and extended structures?

• Simple molecules contain only a few non-metallic atoms bonded together, while extended structures contain many non-metallic atoms arranged in giant lattices.

• Simple molecules are always solids, while extended structures are always gases.

• Simple molecules have high melting points, while extended structures have low melting points.

• Extended structures are always liquids, while simple molecules are always gases.

Which of the following substances is a gas at room temperature?

• Ammonia (NH₃)

• Methanol (CH₃OH)

• Table salt (NaCl)

• Diamond (C)

What is the melting point of diamond?

• 801°C

• 3550°C

• -77.73°C

• 65°C

Which property is typical of simple molecules?

• Low melting and boiling points

• Strong structures due to many bonds

• Indefinitely extended 3-D array of atoms

• Always solid at room temperature

What is the boiling point of methanol?

• 65°C

• 801°C

• 1413°C

• -33.3°C

Why are extended structures strong?

• Because of many bonds between atoms

• Because they are always in the gas state

• Because they contain only a few atoms

• Because they have low melting points

Which of the following is an example of an extended structure?

• Diamond

• Ammonia

• Methanol

• Water

How can simple molecules and extended structures be observed?

• By using models to predict and/or describe phenomena

• By looking at them with the naked eye

• By tasting them

• By listening to their sounds

What is the boiling point of table salt (NaCl)?

• 1413°C

• 65°C

• 4827°C

• -33.3°C

What does the periodic table represent in the context of atomic composition?

• The different types of atoms that combine to form substances

• The boiling points of all substances

• The structure of simple molecules

• The melting points of extended structures