Question

Need help on force of gravitation and centripetal acceleration.

The problem gives me the mass of the proton and the mass of electron. It also gives me that the proton and electron are about 1.0 x 10^-10 m apart in a hydrogen atom. How do I find the force of gravitation that exists between the proton and the electron? and it asks me to find the centripetal accleration of the electron.

I just need the formula and some example problem