An atom of copper (cu) has a mass number of 63 and an atomic number of 29. how many protons does it have?

Answer : and pair of substances are the products.

Explanation :

The given balanced chemical reaction is,

Balanced chemical reaction is the reaction in which the number of atoms of an individual elements present on reactant side must be equal to the product side.

The species present on the left side of the right arrow is the reactant and the species present on the right side of the right arrow is the product.

In the given balanced reaction,

and are reactants.

and are products.

Hence, and pair of substances are the products.