Give the expected ground-state electron configurations for atoms with the following atomic numbers. (c) Z = 80

Video transcript

Hello everyone today. We have been given the following problem. Which of the following is the ground state electron configuration for an atom with z equaling 108. So it's important to note what Z stands for. So Z is going to be our atomic number. Which is essentially how many electrons we have in our element. And so according to the periodic table, 108 corresponds to the element Hasi um or H. S. And this has 108 electrons. To get the ground state electron configuration. We have to take the noble gas. That is just before the um which is going to be Reagan or R N until you put right on in brackets and that immediately gets rid of answer choice A then we just count along so Reagan is in the seventh period and so therefore the first energy orbital it'll encounter is a seven s orbital and it'll be too, because there will be two electrons or two elements in that s orbital. We then passed through the f block. And so the f block starts off with four and 5 and Reagan is in the 5th block. And so that's why it's going to be 5f because all the electrons are filled in 45 F orbital. And so this gets rid of your choice be lastly we enter the D orbital. And so since this is since the D orbital is just one before or one number before the s orbital, this will be a six D six orbital, leaving us with our answer as anti choice C raid on seven S 25 F 14 66. And with that, we've answered our question overall, I hope this helped, and until next time.