Asubstance conducts an electric current when it is in the liquid state. what would the conductivity of the substance in solid form indicate about the type of bond in the substance?
a.) if the solid is conductive, the bonds are ionic.
b.) if the solid is not conductive, the bonds are covalent.
c.) if the solid is conductive, the bonds are metallic.
d.) if the solid is not conductive, the bonds are metallic.

Answer is: C.) If the solid is conductive, the bonds are metallic.

1) Substances with ionic bond conduct an electric current in liquid, but not in solid state, because in liquids ions are mobile, contrary to solids where ions are fixed.

2) Substances with covalent bond not conduct an electric current in liquid and solid state, because they not have free ions or electrons.

3) Substances with metallic  bond conduct an electric current in liquid and solid state, because they have mobile electrons. Most metals have strong metallic bond, because strong electrostatic attractive force between valence electrons (metals usually have low ionization energy and lose electrons easy) and positively charged metal ions.