 And this video will do the second part of this question. What is the full electron configuration of these ions? So remember, all you need to know is number of electrons it's got. So this wants to go, if you want to do the condens. We just talked about this, where 18, 18, this is the argon configuration. So if we do the full, it's going to be argon. It's going to be 1s2, 2s2, 2p6, 3s2, 3p6. Same thing here. s2, 2p6, 3s2, 3p6. And then, so these are isoelectronic with each other. And then, of course, magnesium, 2 plus is going to be the neon configuration, which is 1s2, 2s2, 2p18 electron 2p6. OK, cool. Hopefully that makes sense.