I've always been told that it's eight. This is only because the atom has to have the saem protons (positively charged) neutrons and electrons (negatively charged). However this does not occur with all atoms. :)
Answer:
Here you go.
Explanation:
First of all, there are reactants and products…
Reactants are in the left side (in bold).
Products are on the right (without bold)
Example; NH3 + O2 → N2 + H2O
The answer is A. you sre correct!