Draw atomic orbital diagrams representing the ground-state electron configuration for each of the following elements. a. Na
b. Co
c. Kr
How many unpaired electrons are present in each 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.

The answer is b. because when it leaves the bat, its bringing motion on where its going.