Dear Students,This is college. That means you should know better than to write notes to each other during class on the exercise you're going to hand in. I don't care that Roger is sweet or that you want to buy flowers for Becky. I am curious, however, if you noticed that the spectra of air and nitrogen are almost identical. Please check your high school behavior at the door, or at the bare minimum, write these little notes on pieces of paper that aren't to be graded. Or do what the rest of your classmates are doing, and text each other.