And then, Francie um is the least electro negative element on the periodic table. So this is incredibly important to always remember. So flooring is the most electro negative element on the periodic table. We're also going to notice that a lot of the bottom row is Blanca's well, because they're so large, so heavy they're too unstable to talk about electro negativity now in college, What we all looking to get that perfect 4.0 G P. You'll also notice here that some of the noble gasses don't have electro negativity, negativity values, and that's because they don't want to attract electrons to themselves. With these DNF orbital's, there's expansions that happened in shells, and this kind of messes up the values of electro negativity. Those exist with the transition metals because of variations in their D n F orbital's. There are, of course, are exceptions in camp. So as we're heading to this top right corner of the periodic table, electro negativity will increase Now. The periodic trend is electro negativity increases as we move from left to right across a period and going up a group. So it's great to see American chemist in a form of Linus Pauling getting credit for such an important idea. Usually it's people from Russia or Germany or some other country. And there's not that many American chemist credited with some of these fundamental concepts. Electro activity is one of my favorite topics in Gen. Okay, so remember the distinction here in 1932 the American chemist Linus Pauling proposed electro negativity values for the elements. Electron affinity is the energy released when an electron is added to an element. Oftentimes it's confused with electron affinity. Is a measurement oven elements ability to attract electrons to itself.
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