Identify the following elements: (a)

Video transcript

Hello everyone today. We have the following problem, determine the element represented by X. with 1 86 as a superscript and 75 as a subscript. So the first thing we want to do is we want to draw out our standard representation for an element. So we're gonna use X as an example. We're going to use going to use A and we're going to use Z. So X is going to represent our symbol Which is typically represented by the one or 2 letters that you see on the periodic table, the bolted ones. Z is going to be our atomic number and A is going to represent our mass number. And so what do these terms mean? Let's define them. So first our Z. Or atomic number is going to be essentially equal to the number of protons, which in a neutral species is also equal to the number of electrons and the mass number or a a being the mass number is equal to the number of protons, the positively charged species plus the number of neutrons. And so we see here that our atomic number is 75. And so if we go on the periodic table, we see that this correlates to R. E. Or rainy. Um And so therefore the element that's represented by this symbol is rainy. Um And with that we've solved the problem. I hope this helped. And until next time