Holding the Protons within his body. Castiel then lets them sit for a while longer, so it gets a feel to using just the Protons. From there he releases them from his body to start over again, but this time without gathering up the neutrons, which sounded a lot harder then it should be. But Castiel decided to give it a shot, so he gathers up his lighting chakra once again; does the same process again, but this time only tries to pull the protons away from the chakra, instead of both the protons and neutrons. He fails the first couple of times, but he finally manages to get the hang of it.
"So what is next?"