B. Assume you have a 500 g sample of a radioactive isotope with a half-life of 100 years. Fill in the table showing how many grams of material will remain after the indicated time has passed. (2 points)

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.