What is the atomic number and expected ground-state electron configuration of the yet undiscovered element directly below Fr in the periodic table?

Video transcript

Hello everyone today. We are being given the falling problem referring to the periodic table predict the atomic number Z. And the ground state electron configuration of the unknown element directly below are a radium. So we know that radium has an atomic number Of 120. And since it is neutral, that means we have 100 that means that we have electrons. It's also important to note that radium is in the 8th period or the 8th row of the periodic table. And so we have to determine what our electron configuration would be based on. Three important orbital's or sub shells you have the S P and D. Sub shell. The S sub shell holds a maximum of two electrons. The P sub shell holds a maximum of six electrons and the D sub shell holds a maximum of 10 electrons. And so with us, we have to next look at the noble gas that is before that element of radium or directly below radium. And that is going to be O G. Or oh, that's on Oh, Gunnison has 118 electrons. And so this essentially means that we have two more to distribute. And so what's that going to mean? That implicates that we are going to have our O. G. Here or venison and brackets followed by eight. And it's going to be in the s orbital since the s orbital holds a maximum of two electrons. So this is going to be the electron configuration. The ground state electron configuration for the unknown element directly below radium. And the atomic number Z is going to be overall. I hope that this helped, and until next time.