Answer:
Gibbs free energy equation
Explanation:
Kinetic Energy which relies on an objects mass and velocity and Potential Energy which relies on the height of the object
If element X has 85 protons, then it has 85 electrons.
No matter what element it is, there will ALWAYS be the same amount of protons as there are electrons.
By the way, thanks for asking this question. I just learned this yesterday, so it gave me a way to show what I learned.