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kiruha [24]
3 years ago
5

A hard substance that has a high melting point and is a poor conductor of electricity in the solid phase could be

Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

C) NaCl

Explanation:

A hard substance that has a high melting point and is a poor conductor of electricity in the solid phase could be NaCl

This because it is an ionic compound.

  • Ionic compounds are formed via the electrostatic attraction between oppositely charged ions.
  • Ionic substances have high melting point as solids and as liquids, they have a high boiling point.
  • In aqueous solutions or in molten form, ionic compounds can conduct an electric current using free mobile ions as carriers.
  • In solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity.

Compounds like NaCl, MgO, NaF are in this category.

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