Can someone show me how to write half-equations for electrode reactions?

How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom

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

Asolid that forms and separates from a liquid mixture is called