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