 Okay, so let's do another one of these nuclear reaction problems. Hopefully everybody can already see this is a decay problem. Can you tell that already? Because there's only one thing on the reactor side. This is radium. And what type of decay is it going through here? What type of particle is alpha? Alpha particle, so this is called alpha decay. Alpha decay process. Okay, so same thing. We have to add this side equal to this side. So this is going to be 226 minus 4 is 222. And 88 minus 2 is 86. And then if we look up there, we see radon is 86. So that is the chemical symbol. Okay, so alpha decay of radium 226 gives us radon 222. Is everybody okay with saying that? Wonderful.