Question

What does the sign represent with respect to electrons?

opposite spin of two electrons

different principal energy levels of two electrons

distances of two electrons from the nucleus

attraction between two electrons

Answer 1

It's A, opposite spin of two electrons. I got the answer correct on the test.

Answer 2

You didn't provide any signs, however, commonly this question involves two electrons with opposite pointing arrows, one up and one down. If this is the case, this is supposed to show the opposite spin of two electrons. It would be the fourth answer if the lines pointed towards one another and electrons moved that way.