Mass of reactants is equal to the mass of products if the reaction has the same number of atoms of different elements on either side of the chemical equation respectively.
True
The statement 'Mass of reactants is equal to the mass of products if the reaction has the same number of atoms of different elements on either side of the chemical equation respectively.' is true.
If there are the same number of atoms of various elements on either side of the equation, the total atomic mass on the product side will be equal to the reactant side.