Mass number is equal to the a. average atomic mass b. number of protons + number of electrons c. number of protons + number of neutrons d. number of neutrons + number of electrons answer, will give brainiest

Number of protons + neutrons

ANSWER C

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.