Giant ionic structures

1 mark · Normal

Which property best explains why potassium chloride has a high melting point?

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Correct option: It is made of positive and negative ions held by strong electrostatic forces.

Common mistakes: Choosing delocalised electrons (metal); Choosing covalent bonding

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Marking points

B1 · 1 mark · Chooses: It is made of positive and negative ions held by strong electrostatic forces.

Worked solution

Potassium chloride has a high melting point because it is made of positive and negative ions strongly attracted to each other in a giant lattice.