We know the following about potential energy, which explains a lot about the behavior of sub atomic particles, atoms, molecules, and chemical reactions. Systems with blank PE change in ways that blank their PE. Blank 1; low or high
Blanca 2: increase or decrease

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.