Protons are fundamental particles, meaning they are not made up of smaller particles. They don't have a "formula" in the traditional sense like molecules do.

However, we can represent the proton using:

* Symbol: p⁺ or ¹₁H (this represents the hydrogen-1 isotope, which has one proton and no neutrons)

* Composition: A proton consists of three quarks: two up quarks (u) and one down quark (d).

So, while there's no "formula" in the chemical sense, we can describe a proton's composition and represent it with symbols.