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Lesson: Ionic Structures

Worksheet • 7 Questions

Q1:

In which of the following scenarios is an ionic substance conductive?

  • A When it is molten
  • B When it is cooled with liquid nitrogen
  • C When it is broken into very small pieces
  • D When it contains a mixture of different ions
  • E When it is freshly made

Q2:

Ionic structures are composed of oppositely charged ions. Why are solid ionic structures electrical insulators rather than conductors?

  • AThe ions are locked in place and cannot move in response to an applied electric field.
  • BThe net flow of charge is zero because ions flow in opposite directions in response to an applied electric field.
  • CThe ions are stable so cannot undergo changes in charge in response to an applied electric field.
  • DEach ion is balanced by those of the opposite charge, making the structure neutral overall.
  • EThe regular arrangement of ions causes a reversal of the electric field, opposing the flow of ions.

Q3:

What is the regular arrangement of ions in an ionic structure called?

  • AA crystal lattice
  • B A fixed solid
  • C An amorphous solid
  • D A fluid lattice
  • E A giant covalent structure

Q4:

Why do ionic substances produce conductive solutions when dissolved in water?

  • AThe ions are free to move in response to an applied electric field.
  • BCharge is transferred via ionization reactions so can flow in response to an applied electric field.
  • CWater destabilizes the ions, allowing their charge to increase or decrease in response to an applied electric field.
  • DPositive ions are smaller than negative ions so move more rapidly in response to an applied electric field.
  • EPositive ions are more soluble, so solutions of ionic substances have a non-zero net charge.

Q5:

In which of the following scenarios is an ionic substance conductive?

  • AWhen dissolved in water
  • BWhen just below its melting point
  • CWhen ground into a powder
  • DWhen cooled with liquid nitrogen
  • EWhen in the gas state

Q6:

The forces between ions in ionic structures are generally very strong. Which physical properties would you expect to be high as a result?

  • AMelting and boiling points
  • BConductivity and solubility
  • CColor and smell
  • DElasticity and flexibility

Q7:

What force holds ionic structures together?

  • A Electrostatic attraction
  • B Metallic bonds
  • C Gravity
  • D Covalent bonds
  • E Magnetism
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