Akia is balancing the equation Na + H2O NaOH + H2. He tries to find the coefficients that will balance the equation.

How could he find the correct coefficients?

by counting each individual atom and making sure the number of each kind of atom is the same in the reactants and the products
by counting the total atoms and making sure the number of atoms in the reactants is the same as the number of atoms in the products
by counting the total mass of each compound and making sure the reactants have more mass than the products
by counting the mass of each atom and making sure the reactants are more massive than the products