What explains the structure of metals and delocalized electrons? A. the unit cell model

B. the geometric shape model

C. the covalent bond model

D. the electron sea model

The closer the atoms are to becoming ionic the more highly dense the negatively charged side gets.

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.