And what that basically means is that because our ratio of eight to outer is smaller, that means this shielding effect will not be as great, because now we have an extra electron floating around our shell. So these guys will experience more charge than Dixon electron on the lithium. And what that means is that these two electrons will be pulled closer to the nucleus than here. And therefore the radius of this atom will be smaller than the radius of this atom. And that's because of the following. They both have a one s and a two s orbital.