Answer:
Shift it toward the reactants.
Explanation:
The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed. Hence, the quantity of mass is "conserved" over time.
Well scientific laws are really laws! You can't change a scientific law and laws can be facts as well. Hope this helps!
You can simply subtract the atomic number from the mass number in order to find the number of neutrons.