The answer is: The engine will run inefficiently APEX....
Many nitrogen atoms have seven neutrons<span> (14-7 = 7). Some atoms of nitrogen, however, have eight electrons. They are atoms of N-15, an isotope of nitrogen. In a neutral atom, the number of protons must equal the number of electrons.</span>
It's not, if it were it would be ice. The water is a bit warmer.
Please refer to the attachment for a complete classification of your specified matter.
Ernest Rutherford i believe