Answer:
The half-life of reactants in a nuclear decay reaction remains constant over time, but the mass of reactants that are consumed decreases.
Explanation:
The half-life is defined as the time in which half of the starting number of radioactive atoms decayed in products. The half-life it is a intrinsec property of the reactant atom and it is a constant. As time passes more and more atoms are decaying through the nuclear reaction so the quantity of the radioactive compounds (reactant) is decreasing.
