Sodium tends lose a single electron in natural settings. based on what you know, what are two other elements that tend to do the same thing? question 4 options: sodium and magnesium hydrogen and helium beryllium and boron potassium and rubidium **i said d**,

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.