Identify the third-row elements, X, that form the following ions. (a)

Video transcript

Hello everyone today, we are being given the following problem. What element found in the third row of the periodic table corresponds to X in the following molecular structure? So here we have X in the center and we are being asked to identify what element it could possibly be. So the first thing when you take into account is the number of valence electrons total. This structure has 32 of these valence electrons. If we look more closely we can see that our flooring here Because it is a group seven, a element Has seven valence electrons and there are four of them. So we're gonna take that seven to multiply it by four giving us electrons total. And so we have four electrons left over once we take that 32 and subtract it from that 28. And so we have four electrons left that we can use to determine the identity of element X. It was also stated that X Is in the 3rd row of the periodic table. And if it isn't a third row of the periodic table, So we'll say X is in the 3rd row of the periodic table And it has 44 valence electrons left. This is going to correspond with the principal that the group number determines The valence electrons. So whichever group number you are in. For example, if you're in group four a. You're gonna have four valence electrons. Group three a you're gonna have three valence electrons, so on, and so forth. So we have these principles here to help us determine the identity of this element. And so when you are in group four a of the periodic table, and you're in the third row, this is going to correspond with silicon or S. I. For its symbol, or B. And with that, we have solved the problem overall, I hope that this helped, and until next time.