Differentiate between standard heat of neutralization and standard heat of formation​

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

Hey can you me with this i really need y’all

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table