In order for hydrogen bonding to occur, the compound has to have a hydrogen attached to one of three atoms. Which of the following is NOT
one of those three atoms?
Nitrogen
Fluorine
dh, Chlorine
Oxygen

It only has N,F, and O. So your answer is Chlorine.

The correct answer for this question is that a statement that can be proven by observation or measurement is known as a fact. The other possible answers here simply refer to idea that different individuals can place value on, but that are not necessarily known to be true.