00:01
Alright, so we're considering three functional groups, hydroxyl, sulfhydryl, and phosphate, which i have drawn here, and we want to evaluate the most and the least polar.
00:09
So let's consider the nature of the polarity.
00:11
So if you have hydroxyl, oxygen, and hydrogen, oxygen is a lot more electronegative, so it's going to pull electrons away from the hydrogen, creating a polar bond.
00:21
Same thing with sulfur versus hydrogen.
00:23
Sulfur is more electronegative than hydrogen.
00:26
Now, if you compare the strength of the electronegativities of oxygen and sulfur, because the hydrogen is the common atom there, oxygen is more electronegative.
00:35
It's higher up on the periodic table than sulfur.
00:37
It has fewer energy levels, so it can pull electrons more closely.
00:41
It's one of the most electronegative elements...