Substance A is shiny, conducts electricity well, and melts at 975 C. Substance A is likely a(n): Question 11 1. ionic solid 2. metallic solid 3. molecular solid 4. covalent network solid Substance B is hard, does not conduct electricity, and melts at 1200 C. Substance B is likely a(n): Question 12 1. ionic solid 2. metallic solid 3. molecular solid 4. covalent network solid Explain why a hydrogen bond between two water molecules is weaker than a hydrogen bond between two hydrogen fluoride molecules.