Bonding), hardly ever atomic nuclei. The total mass and number of atoms of all reactants equals Those people of all products, and energy is almost always eaten or liberated ( A chemical reaction’s activation energy would be the “threshold” level of energy needed to break the bonds inside the reactants. https://chemicalreactionscalculat40000.life3dblog.com/24679237/top-guidelines-of-chemical-reactions-decomposition