 Okay, let's go ahead and attempt to balance this nuclear chemical equation. So remember it's just like balancing a regular chemical equation, so the number of neutrons and protons that you have on this side of the reaction, you have to have the same number over here. So if we add up our total number, our total mass number, right, that's going to be 28 here and this is 27, so this mass number has to be 1. Is everybody okay with that? There. And we look for our number of protons, we have 11 plus 2, that's 13, and over here we have 13 as well. So this is going to be zero. Okay, so the particle that's here is just a neutron. So something that has a mass of 1 and 0 protons. Okay, so if you see something like this, you could identify what type of nuclear reaction this is, can anybody identify the type of nuclear reaction? This is fission, yeah, very good, this is fission. So fission is when you have a heavy atom that's bombarded with a small particle and is broken up, and here's another nuclear particle that we often see, so a decayed particle, does anybody know what it is called? What type of particle? This is an alpha particle. Are there any questions on this one? And the rest are going to be very simple.