If you’ve been studying hard, by now you have great insight into why oil and water don’t mix. You understand that the oxygen atom has eight electrons: two in the first shell, and six in the valence shell. Two of these six valence electrons bond to two hydrogen atoms, which leaves the four remaining valence electrons to form two lone pairs (nonbonding electrons). These lone pairs push the hydrogen atoms together, which allows the highly electronegative oxygen atom to pull electrons toward itself. As a result, the oxygen side of the water molecule is slightly negative, and the hydrogen side is slightly positive, which makes water a sticky sort of molecule. Because of this stickiness, water has a high boiling point, and it effectively excludes less sticky oil molecules. Your understanding of the natural world is now much deeper. What value is there in having these sorts of deeper understandings?