Worksheet: Covalent Structures

In this worksheet, we will practice describing common features of covalent structures and linking their material properties to their chemical structures.

Q1:

Which of the following properties can generally be used to differentiate a molecular solid from a covalent network?

  • AElectrical conductivity
  • BMelting point
  • CColor
  • DChemical reactivity
  • EBrittleness

Q2:

At room temperature and pressure, the most stable form of sulfur is the simple molecule S8. However, heating the material to a high temperature can produce continuous chains of sulfur atoms. Which term best describes the type of structure displayed by high-temperature sulfur?

  • AIonic
  • BMetallic
  • CAtomic
  • DSimple molecular
  • EGiant covalent

Q3:

In solids displaying simple molecular structures, which type of bonding is typically present?

  • ACovalent
  • BMetallic
  • CIonic

Q4:

Which feature of simple molecular covalent structures is responsible for their low melting and boiling points?

  • AStrong intermolecular forces
  • BInability to crystallize
  • CRepulsive intermolecular forces
  • DWeak intermolecular forces
  • ENo intermolecular forces

Q5:

Which of the following is an example of a giant covalent structure?

  • AWater
  • BSodium chloride
  • CDiamond
  • DIron
  • ECarbon dioxide

Q6:

Which of the following is a common property of giant covalent structures?

  • AFlexibility
  • BHigh density
  • CHigh elasticity
  • DHigh melting point
  • EColorfulness

Q7:

Which of the following is not a typical characteristic of solids with a giant covalent structure?

  • AHigh water solubility
  • BHigh melting point
  • CLow electrical conductivity
  • DHigh level of hardness

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