In the Figure Shown, Is a Chemical Reaction Occurring

Multiple Choice

In the figure shown, is a chemical reaction occurring?

A) No, because there are the same number of atoms in both images.
B) Yes, because the atoms have rearranged to form a new substance.
C) No, because there are oxygen atoms and nitrogen atoms in both images.
D) No, because both the reactants and products are colorless gases.
E) Yes, because the reactants are gases, but the product is a solid.