If you could see the electric field coming off a proton you would notice that electric field lines are what?

The electric field generated by a proton is a radial field, so we would see the field lines going radially from the proton toward every direction. I've attached a picture representing the electric field generated by a positive charge, such as a proton, and we can see the field lines going radially from the charge toward every direction. 

The particles of the gas inside the ball heats up, bouncing off each other and spreading farther apart.hope my answer has you : )