Which of the following properties do network solids have in common with ionic compounds? Solubility in water
Conducts electricity in a solid state
Low melting point
High melting point Dissociates in water

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Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.