Which of these is a property of a substance that is composed of atoms that are held together by ionic bonds?
it can be shaped into wires.
it has a low melting point.
it conducts electricity when in solid form.
it conducts electricity when it is dissolved in water.

It conducts electricity when it is dissolved in water.

Explanation: Ionic compounds are formed by complete transfer of electrons held together by strong ionic bonds.

Only metals are ductile, that is they can be drawn into wires. Ionic compounds are not ductile.

As they are held by strong coloumbic forces, they have high melting points.

They conduct electricity only in molten form  and not in solid form as they dissociate to give ions in molten form which are responsible for conduction of electricity.

hloride, what is the mass of calcium in

explanation:

c (diamond),

sio2 (quartz)