Which of the following statements is/are true? A. A balanced chemical equation has an equal number of protons of different elements in the reactants and products. B. An unbalanced chemical equation has an unequal number of protons of one or more elements in the reactants and products.

A balanced chemical equation has an equal number of atoms of each element on both the reactant and product sides, not protons. Hence, statement A is false. Similarly, an unbalanced chemical equation has an unequal number of atoms, not protons, for one or more elements, so statement B is also false.