Radiation decrease over time due to the concentration of radioactive atoms and the concentration decreases as radioactive particles are emitted (Option D).
<h3>What is radiation?</h3>
Radiation refers to the transmission of energy by means of subatomic particles that travel as waves.
Radioactive isotopes are also known as radioisotopes, which have unstable combinations of subatomic particles (i.e., neutrons or protons) in their atomic nuclei, and thus may emit alpha particles, gamma rays or beta particles.
Radioactive isotopes such as C14 lost (emit) energy per unit of time, which is known as radiation or radioactive decay.
In conclusion, radiation decrease over time due to the concentration of radioactive atoms and the concentration decreases as radioactive particles are emitted (Option D).
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