what happens to the half-life and mass of reactants broken down during a nuclear decay reaction?

the half-life of the reactants in a nuclear decay reaction remains constant over time, and the mass of the reactants that are consumed stays the same.
the half-life of reactants in a nuclear decay reaction remains constant over time, but the mass of reactants that are consumed decreases.
the half-life of reactants in a nuclear decay reaction decreases over time, but the mass of the reactants that are consumed stays the same.
the half-life of reactants in a nuclear decay reaction increases over time, and the mass of the reactants that are consumed increases.

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.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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