Sodium chloride is made up of clear, colorless crystals. A solution of sodium chloride in water is a good conductor of electricity. Which statement describes sodium chloride?
It is made up of ions that are held together by ionic bonds.
It is made up of atoms that are held together by metallic bonds.
It is made up of atoms that are held together by covalent bonds with equal sharing of electrons.
It is made up of atoms that are held together by covalent bonds with unequal sharing of electrons.

Question

Sodium chloride is made up of clear, colorless crystals. A solution of sodium chloride in water is a good conductor of electricity. Which statement describes sodium chloride?
It is made up of ions that are held together by ionic bonds.
It is made up of atoms that are held together by metallic bonds.
It is made up of atoms that are held together by covalent bonds with equal sharing of electrons.
It is made up of atoms that are held together by covalent bonds with unequal sharing of electrons.

anonymous · Answer

Since the solution of $NaCl$ in water is a good conductor of electricity, it must be made up of ions. Therefore, they are held together by ionic bonds.